// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ssl/ssl_blocking_page.h"
#include "base/build_time.h"
#include "base/command_line.h"
#include "base/i18n/rtl.h"
#include "base/i18n/time_formatting.h"
#include "base/metrics/field_trial.h"
#include "base/metrics/histogram.h"
#include "base/process/launch.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_piece.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "base/strings/utf_string_conversions.h"
#include "base/time/time.h"
#include "base/values.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/chrome_notification_types.h"
#include "chrome/browser/history/history_service_factory.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/renderer_preferences_util.h"
#include "chrome/browser/ssl/ssl_error_classification.h"
#include "chrome/browser/ssl/ssl_error_info.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/grit/chromium_strings.h"
#include "chrome/grit/generated_resources.h"
#include "components/google/core/browser/google_util.h"
#include "content/public/browser/cert_store.h"
#include "content/public/browser/interstitial_page.h"
#include "content/public/browser/navigation_controller.h"
#include "content/public/browser/navigation_entry.h"
#include "content/public/browser/notification_service.h"
#include "content/public/browser/notification_types.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/web_contents.h"
#include "content/public/common/ssl_status.h"
#include "grit/browser_resources.h"
#include "net/base/hash_value.h"
#include "net/base/net_errors.h"
#include "net/base/net_util.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/base/webui/jstemplate_builder.h"
#include "ui/base/webui/web_ui_util.h"
#if defined(ENABLE_EXTENSIONS)
#include "chrome/browser/extensions/api/experience_sampling_private/experience_sampling.h"
#endif
#if defined(OS_WIN)
#include "base/base_paths_win.h"
#include "base/path_service.h"
#include "base/strings/string16.h"
#include "base/win/windows_version.h"
#endif
#if defined(OS_CHROMEOS)
#include "chrome/browser/profiles/profile_manager.h"
#include "chrome/browser/ui/chrome_pages.h"
#include "chrome/common/url_constants.h"
#endif
using base::ASCIIToUTF16;
using base::TimeTicks;
using content::InterstitialPage;
using content::NavigationController;
using content::NavigationEntry;
#if defined(ENABLE_EXTENSIONS)
using extensions::ExperienceSamplingEvent;
#endif
namespace {
// URL for help page.
const char kHelpURL[] = "https://support.google.com/chrome/answer/4454607";
// Constants for the Experience Sampling instrumentation.
#if defined(ENABLE_EXTENSIONS)
const char kEventNameBase[] = "ssl_interstitial_";
const char kEventNotOverridable[] = "notoverridable_";
const char kEventOverridable[] = "overridable_";
#endif
// Events for UMA. Do not reorder or change!
enum SSLBlockingPageEvent {
SHOW_ALL,
SHOW_OVERRIDABLE,
PROCEED_OVERRIDABLE,
PROCEED_NAME,
PROCEED_DATE,
PROCEED_AUTHORITY,
DONT_PROCEED_OVERRIDABLE,
DONT_PROCEED_NAME,
DONT_PROCEED_DATE,
DONT_PROCEED_AUTHORITY,
MORE,
SHOW_UNDERSTAND, // Used by the summer 2013 Finch trial. Deprecated.
SHOW_INTERNAL_HOSTNAME,
PROCEED_INTERNAL_HOSTNAME,
SHOW_NEW_SITE,
PROCEED_NEW_SITE,
PROCEED_MANUAL_NONOVERRIDABLE,
// Captive Portal errors moved to ssl_error_classification.
DEPRECATED_CAPTIVE_PORTAL_DETECTION_ENABLED,
DEPRECATED_CAPTIVE_PORTAL_DETECTION_ENABLED_OVERRIDABLE,
DEPRECATED_CAPTIVE_PORTAL_PROBE_COMPLETED,
DEPRECATED_CAPTIVE_PORTAL_PROBE_COMPLETED_OVERRIDABLE,
DEPRECATED_CAPTIVE_PORTAL_NO_RESPONSE,
DEPRECATED_CAPTIVE_PORTAL_NO_RESPONSE_OVERRIDABLE,
DEPRECATED_CAPTIVE_PORTAL_DETECTED,
DEPRECATED_CAPTIVE_PORTAL_DETECTED_OVERRIDABLE,
UNUSED_BLOCKING_PAGE_EVENT,
};
// Events for UMA. Do not reorder or change!
enum SSLExpirationAndDecision {
EXPIRED_AND_PROCEED,
EXPIRED_AND_DO_NOT_PROCEED,
NOT_EXPIRED_AND_PROCEED,
NOT_EXPIRED_AND_DO_NOT_PROCEED,
END_OF_SSL_EXPIRATION_AND_DECISION,
};
void RecordSSLBlockingPageEventStats(SSLBlockingPageEvent event) {
UMA_HISTOGRAM_ENUMERATION("interstitial.ssl",
event,
UNUSED_BLOCKING_PAGE_EVENT);
}
void RecordSSLExpirationPageEventState(bool expired_but_previously_allowed,
bool proceed,
bool overridable) {
SSLExpirationAndDecision event;
if (expired_but_previously_allowed && proceed)
event = EXPIRED_AND_PROCEED;
else if (expired_but_previously_allowed && !proceed)
event = EXPIRED_AND_DO_NOT_PROCEED;
else if (!expired_but_previously_allowed && proceed)
event = NOT_EXPIRED_AND_PROCEED;
else
event = NOT_EXPIRED_AND_DO_NOT_PROCEED;
if (overridable) {
UMA_HISTOGRAM_ENUMERATION(
"interstitial.ssl.expiration_and_decision.overridable",
event,
END_OF_SSL_EXPIRATION_AND_DECISION);
} else {
UMA_HISTOGRAM_ENUMERATION(
"interstitial.ssl.expiration_and_decision.nonoverridable",
event,
END_OF_SSL_EXPIRATION_AND_DECISION);
}
}
void RecordSSLBlockingPageDetailedStats(bool proceed,
int cert_error,
bool overridable,
bool internal,
int num_visits,
bool expired_but_previously_allowed) {
UMA_HISTOGRAM_ENUMERATION("interstitial.ssl_error_type",
SSLErrorInfo::NetErrorToErrorType(cert_error), SSLErrorInfo::END_OF_ENUM);
RecordSSLExpirationPageEventState(
expired_but_previously_allowed, proceed, overridable);
if (!overridable) {
if (proceed) {
RecordSSLBlockingPageEventStats(PROCEED_MANUAL_NONOVERRIDABLE);
}
// Overridable is false if the user didn't have any option except to turn
// back. If that's the case, don't record some of the metrics.
return;
}
if (num_visits == 0)
RecordSSLBlockingPageEventStats(SHOW_NEW_SITE);
if (proceed) {
RecordSSLBlockingPageEventStats(PROCEED_OVERRIDABLE);
if (internal)
RecordSSLBlockingPageEventStats(PROCEED_INTERNAL_HOSTNAME);
if (num_visits == 0)
RecordSSLBlockingPageEventStats(PROCEED_NEW_SITE);
} else if (!proceed) {
RecordSSLBlockingPageEventStats(DONT_PROCEED_OVERRIDABLE);
}
SSLErrorInfo::ErrorType type = SSLErrorInfo::NetErrorToErrorType(cert_error);
switch (type) {
case SSLErrorInfo::CERT_COMMON_NAME_INVALID: {
if (proceed)
RecordSSLBlockingPageEventStats(PROCEED_NAME);
else
RecordSSLBlockingPageEventStats(DONT_PROCEED_NAME);
break;
}
case SSLErrorInfo::CERT_DATE_INVALID: {
if (proceed)
RecordSSLBlockingPageEventStats(PROCEED_DATE);
else
RecordSSLBlockingPageEventStats(DONT_PROCEED_DATE);
break;
}
case SSLErrorInfo::CERT_AUTHORITY_INVALID: {
if (proceed)
RecordSSLBlockingPageEventStats(PROCEED_AUTHORITY);
else
RecordSSLBlockingPageEventStats(DONT_PROCEED_AUTHORITY);
break;
}
default: {
break;
}
}
}
void LaunchDateAndTimeSettings() {
#if defined(OS_CHROMEOS)
std::string sub_page = std::string(chrome::kSearchSubPage) + "#" +
l10n_util::GetStringUTF8(IDS_OPTIONS_SETTINGS_SECTION_TITLE_DATETIME);
chrome::ShowSettingsSubPageForProfile(
ProfileManager::GetActiveUserProfile(), sub_page);
return;
#elif defined(OS_ANDROID)
CommandLine command(base::FilePath("/system/bin/am"));
command.AppendArg("start");
command.AppendArg(
"'com.android.settings/.Settings$DateTimeSettingsActivity'");
#elif defined(OS_IOS)
// Apparently, iOS really does not have a way to launch the date and time
// settings. Weird. TODO(palmer): Do something more graceful than ignoring
// the user's click! crbug.com/394993
return;
#elif defined(OS_LINUX)
struct ClockCommand {
const char* pathname;
const char* argument;
};
static const ClockCommand kClockCommands[] = {
// GNOME
//
// NOTE: On old Ubuntu, naming control panels doesn't work, so it
// opens the overview. This will have to be good enough.
{ "/usr/bin/gnome-control-center", "datetime" },
{ "/usr/local/bin/gnome-control-center", "datetime" },
{ "/opt/bin/gnome-control-center", "datetime" },
// KDE
{ "/usr/bin/kcmshell4", "clock" },
{ "/usr/local/bin/kcmshell4", "clock" },
{ "/opt/bin/kcmshell4", "clock" },
};
CommandLine command(base::FilePath(""));
for (size_t i = 0; i < arraysize(kClockCommands); ++i) {
base::FilePath pathname(kClockCommands[i].pathname);
if (base::PathExists(pathname)) {
command.SetProgram(pathname);
command.AppendArg(kClockCommands[i].argument);
break;
}
}
if (command.GetProgram().empty()) {
// Alas, there is nothing we can do.
return;
}
#elif defined(OS_MACOSX)
CommandLine command(base::FilePath("/usr/bin/open"));
command.AppendArg("/System/Library/PreferencePanes/DateAndTime.prefPane");
#elif defined(OS_WIN)
base::FilePath path;
PathService::Get(base::DIR_SYSTEM, &path);
static const base::char16 kControlPanelExe[] = L"control.exe";
path = path.Append(base::string16(kControlPanelExe));
CommandLine command(path);
command.AppendArg(std::string("/name"));
command.AppendArg(std::string("Microsoft.DateAndTime"));
#else
return;
#endif
#if !defined(OS_CHROMEOS)
base::LaunchOptions options;
options.wait = false;
#if defined(OS_LINUX)
options.allow_new_privs = true;
#endif
base::LaunchProcess(command, options, NULL);
#endif
}
bool IsErrorDueToBadClock(const base::Time& now, int error) {
if (SSLErrorInfo::NetErrorToErrorType(error) !=
SSLErrorInfo::CERT_DATE_INVALID) {
return false;
}
return SSLErrorClassification::IsUserClockInThePast(now) ||
SSLErrorClassification::IsUserClockInTheFuture(now);
}
} // namespace
// Note that we always create a navigation entry with SSL errors.
// No error happening loading a sub-resource triggers an interstitial so far.
SSLBlockingPage::SSLBlockingPage(content::WebContents* web_contents,
int cert_error,
const net::SSLInfo& ssl_info,
const GURL& request_url,
int options_mask,
const base::Callback<void(bool)>& callback)
: callback_(callback),
web_contents_(web_contents),
cert_error_(cert_error),
ssl_info_(ssl_info),
request_url_(request_url),
overridable_(options_mask & OVERRIDABLE &&
!(options_mask & STRICT_ENFORCEMENT)),
strict_enforcement_((options_mask & STRICT_ENFORCEMENT) != 0),
interstitial_page_(NULL),
internal_(false),
num_visits_(-1),
expired_but_previously_allowed_(
(options_mask & EXPIRED_BUT_PREVIOUSLY_ALLOWED) != 0) {
Profile* profile = Profile::FromBrowserContext(
web_contents->GetBrowserContext());
// For UMA stats.
if (net::IsHostnameNonUnique(request_url_.HostNoBrackets()))
internal_ = true;
RecordSSLBlockingPageEventStats(SHOW_ALL);
if (overridable_) {
RecordSSLBlockingPageEventStats(SHOW_OVERRIDABLE);
if (internal_)
RecordSSLBlockingPageEventStats(SHOW_INTERNAL_HOSTNAME);
HistoryService* history_service = HistoryServiceFactory::GetForProfile(
profile, Profile::EXPLICIT_ACCESS);
if (history_service) {
history_service->GetVisibleVisitCountToHost(
request_url_,
base::Bind(&SSLBlockingPage::OnGotHistoryCount,
base::Unretained(this)),
&request_tracker_);
}
}
ssl_error_classification_.reset(new SSLErrorClassification(
web_contents_,
base::Time::NowFromSystemTime(),
request_url_,
cert_error_,
*ssl_info_.cert.get()));
ssl_error_classification_->RecordUMAStatistics(overridable_);
#if defined(ENABLE_CAPTIVE_PORTAL_DETECTION)
ssl_error_classification_->RecordCaptivePortalUMAStatistics(overridable_);
#endif
#if defined(ENABLE_EXTENSIONS)
// ExperienceSampling: Set up new sampling event for this interstitial.
std::string event_name(kEventNameBase);
if (overridable_ && !strict_enforcement_)
event_name.append(kEventOverridable);
else
event_name.append(kEventNotOverridable);
event_name.append(net::ErrorToString(cert_error_));
sampling_event_.reset(new ExperienceSamplingEvent(
event_name,
request_url_,
web_contents_->GetLastCommittedURL(),
web_contents_->GetBrowserContext()));
#endif
// Creating an interstitial without showing (e.g. from chrome://interstitials)
// it leaks memory, so don't create it here.
}
SSLBlockingPage::~SSLBlockingPage() {
// InvalidCommonNameSeverityScore() and InvalidDateSeverityScore() are in the
// destructor because they depend on knowing whether captive portal detection
// happened before the user made a decision.
SSLErrorInfo::ErrorType type =
SSLErrorInfo::NetErrorToErrorType(cert_error_);
switch (type) {
case SSLErrorInfo::CERT_DATE_INVALID:
ssl_error_classification_->InvalidDateSeverityScore();
break;
case SSLErrorInfo::CERT_COMMON_NAME_INVALID:
ssl_error_classification_->InvalidCommonNameSeverityScore();
break;
default:
break;
}
if (!callback_.is_null()) {
RecordSSLBlockingPageDetailedStats(false,
cert_error_,
overridable_,
internal_,
num_visits_,
expired_but_previously_allowed_);
// The page is closed without the user having chosen what to do, default to
// deny.
NotifyDenyCertificate();
}
}
void SSLBlockingPage::Show() {
DCHECK(!interstitial_page_);
interstitial_page_ = InterstitialPage::Create(
web_contents_, true, request_url_, this);
interstitial_page_->Show();
}
std::string SSLBlockingPage::GetHTMLContents() {
base::DictionaryValue load_time_data;
base::string16 url(ASCIIToUTF16(request_url_.host()));
if (base::i18n::IsRTL())
base::i18n::WrapStringWithLTRFormatting(&url);
webui::SetFontAndTextDirection(&load_time_data);
// Shared values for both the overridable and non-overridable versions.
load_time_data.SetBoolean("ssl", true);
load_time_data.SetBoolean("overridable", overridable_);
load_time_data.SetString(
"tabTitle", l10n_util::GetStringUTF16(IDS_SSL_V2_TITLE));
load_time_data.SetString(
"heading", l10n_util::GetStringUTF16(IDS_SSL_V2_HEADING));
base::Time now = base::Time::NowFromSystemTime();
bool bad_clock = IsErrorDueToBadClock(now, cert_error_);
if (bad_clock) {
load_time_data.SetString("primaryParagraph",
l10n_util::GetStringFUTF16(
IDS_SSL_CLOCK_ERROR,
url,
base::TimeFormatShortDate(now)));
} else {
load_time_data.SetString(
"primaryParagraph",
l10n_util::GetStringFUTF16(IDS_SSL_V2_PRIMARY_PARAGRAPH, url));
}
load_time_data.SetString(
"openDetails",
l10n_util::GetStringUTF16(IDS_SSL_V2_OPEN_DETAILS_BUTTON));
load_time_data.SetString(
"closeDetails",
l10n_util::GetStringUTF16(IDS_SSL_V2_CLOSE_DETAILS_BUTTON));
load_time_data.SetString("errorCode", net::ErrorToString(cert_error_));
if (overridable_) {
SSLErrorInfo error_info =
SSLErrorInfo::CreateError(
SSLErrorInfo::NetErrorToErrorType(cert_error_),
ssl_info_.cert.get(),
request_url_);
if (bad_clock) {
load_time_data.SetString("explanationParagraph",
l10n_util::GetStringFUTF16(
IDS_SSL_CLOCK_ERROR_EXPLANATION, url));
} else {
load_time_data.SetString("explanationParagraph", error_info.details());
}
load_time_data.SetString(
"primaryButtonText",
l10n_util::GetStringUTF16(IDS_SSL_OVERRIDABLE_SAFETY_BUTTON));
load_time_data.SetString(
"finalParagraph",
l10n_util::GetStringFUTF16(IDS_SSL_OVERRIDABLE_PROCEED_PARAGRAPH,
url));
} else {
SSLErrorInfo::ErrorType type =
SSLErrorInfo::NetErrorToErrorType(cert_error_);
if (type == SSLErrorInfo::CERT_INVALID && SSLErrorClassification::
MaybeWindowsLacksSHA256Support()) {
load_time_data.SetString(
"explanationParagraph",
l10n_util::GetStringFUTF16(
IDS_SSL_NONOVERRIDABLE_MORE_INVALID_SP3, url));
} else if (bad_clock) {
load_time_data.SetString("explanationParagraph",
l10n_util::GetStringFUTF16(
IDS_SSL_CLOCK_ERROR_EXPLANATION, url));
} else {
load_time_data.SetString("explanationParagraph",
l10n_util::GetStringFUTF16(
IDS_SSL_NONOVERRIDABLE_MORE, url));
}
load_time_data.SetString(
"primaryButtonText",
l10n_util::GetStringUTF16(IDS_SSL_NONOVERRIDABLE_RELOAD_BUTTON));
// Customize the help link depending on the specific error type.
// Only mark as HSTS if none of the more specific error types apply, and use
// INVALID as a fallback if no other string is appropriate.
load_time_data.SetInteger("errorType", type);
int help_string = IDS_SSL_NONOVERRIDABLE_INVALID;
switch (type) {
case SSLErrorInfo::CERT_REVOKED:
help_string = IDS_SSL_NONOVERRIDABLE_REVOKED;
break;
case SSLErrorInfo::CERT_PINNED_KEY_MISSING:
help_string = IDS_SSL_NONOVERRIDABLE_PINNED;
break;
case SSLErrorInfo::CERT_INVALID:
help_string = IDS_SSL_NONOVERRIDABLE_INVALID;
break;
default:
if (strict_enforcement_)
help_string = IDS_SSL_NONOVERRIDABLE_HSTS;
}
load_time_data.SetString(
"finalParagraph", l10n_util::GetStringFUTF16(help_string, url));
}
// Set debugging information at the bottom of the warning.
load_time_data.SetString(
"subject", ssl_info_.cert->subject().GetDisplayName());
load_time_data.SetString(
"issuer", ssl_info_.cert->issuer().GetDisplayName());
load_time_data.SetString(
"expirationDate",
base::TimeFormatShortDate(ssl_info_.cert->valid_expiry()));
load_time_data.SetString(
"currentDate", base::TimeFormatShortDate(now));
std::vector<std::string> encoded_chain;
ssl_info_.cert->GetPEMEncodedChain(&encoded_chain);
load_time_data.SetString("pem", JoinString(encoded_chain, std::string()));
base::StringPiece html(
ResourceBundle::GetSharedInstance().GetRawDataResource(
IRD_SECURITY_INTERSTITIAL_HTML));
webui::UseVersion2 version;
return webui::GetI18nTemplateHtml(html, &load_time_data);
}
void SSLBlockingPage::OverrideEntry(NavigationEntry* entry) {
int cert_id = content::CertStore::GetInstance()->StoreCert(
ssl_info_.cert.get(), web_contents_->GetRenderProcessHost()->GetID());
DCHECK(cert_id);
entry->GetSSL().security_style =
content::SECURITY_STYLE_AUTHENTICATION_BROKEN;
entry->GetSSL().cert_id = cert_id;
entry->GetSSL().cert_status = ssl_info_.cert_status;
entry->GetSSL().security_bits = ssl_info_.security_bits;
}
// This handles the commands sent from the interstitial JavaScript. They are
// defined in chrome/browser/resources/ssl/ssl_errors_common.js.
// DO NOT reorder or change this logic without also changing the JavaScript!
void SSLBlockingPage::CommandReceived(const std::string& command) {
int cmd = 0;
bool retval = base::StringToInt(command, &cmd);
DCHECK(retval);
switch (cmd) {
case CMD_DONT_PROCEED: {
interstitial_page_->DontProceed();
break;
}
case CMD_PROCEED: {
interstitial_page_->Proceed();
break;
}
case CMD_MORE: {
RecordSSLBlockingPageEventStats(MORE);
#if defined(ENABLE_EXTENSIONS)
if (sampling_event_.get())
sampling_event_->set_has_viewed_details(true);
#endif
break;
}
case CMD_RELOAD: {
// The interstitial can't refresh itself.
web_contents_->GetController().Reload(true);
break;
}
case CMD_HELP: {
content::NavigationController::LoadURLParams help_page_params(
google_util::AppendGoogleLocaleParam(
GURL(kHelpURL), g_browser_process->GetApplicationLocale()));
#if defined(ENABLE_EXTENSIONS)
if (sampling_event_.get())
sampling_event_->set_has_viewed_learn_more(true);
#endif
web_contents_->GetController().LoadURLWithParams(help_page_params);
break;
}
case CMD_CLOCK: {
LaunchDateAndTimeSettings();
break;
}
default: {
NOTREACHED();
}
}
}
void SSLBlockingPage::OverrideRendererPrefs(
content::RendererPreferences* prefs) {
Profile* profile = Profile::FromBrowserContext(
web_contents_->GetBrowserContext());
renderer_preferences_util::UpdateFromSystemSettings(prefs, profile);
}
void SSLBlockingPage::OnProceed() {
RecordSSLBlockingPageDetailedStats(true,
cert_error_,
overridable_,
internal_,
num_visits_,
expired_but_previously_allowed_);
#if defined(ENABLE_EXTENSIONS)
// ExperienceSampling: Notify that user decided to proceed.
if (sampling_event_.get())
sampling_event_->CreateUserDecisionEvent(ExperienceSamplingEvent::kProceed);
#endif
// Accepting the certificate resumes the loading of the page.
NotifyAllowCertificate();
}
void SSLBlockingPage::OnDontProceed() {
RecordSSLBlockingPageDetailedStats(false,
cert_error_,
overridable_,
internal_,
num_visits_,
expired_but_previously_allowed_);
#if defined(ENABLE_EXTENSIONS)
// ExperienceSampling: Notify that user decided to not proceed.
// This also occurs if the user navigates away or closes the tab.
if (sampling_event_.get())
sampling_event_->CreateUserDecisionEvent(ExperienceSamplingEvent::kDeny);
#endif
NotifyDenyCertificate();
}
void SSLBlockingPage::NotifyDenyCertificate() {
// It's possible that callback_ may not exist if the user clicks "Proceed"
// followed by pressing the back button before the interstitial is hidden.
// In that case the certificate will still be treated as allowed.
if (callback_.is_null())
return;
callback_.Run(false);
callback_.Reset();
}
void SSLBlockingPage::NotifyAllowCertificate() {
DCHECK(!callback_.is_null());
callback_.Run(true);
callback_.Reset();
}
// static
void SSLBlockingPage::SetExtraInfo(
base::DictionaryValue* strings,
const std::vector<base::string16>& extra_info) {
DCHECK_LT(extra_info.size(), 5U); // We allow 5 paragraphs max.
const char* keys[5] = {
"moreInfo1", "moreInfo2", "moreInfo3", "moreInfo4", "moreInfo5"
};
int i;
for (i = 0; i < static_cast<int>(extra_info.size()); i++) {
strings->SetString(keys[i], extra_info[i]);
}
for (; i < 5; i++) {
strings->SetString(keys[i], std::string());
}
}
void SSLBlockingPage::OnGotHistoryCount(bool success,
int num_visits,
base::Time first_visit) {
num_visits_ = num_visits;
}