The Data Reduction Proxy component contains code for a configuring and using
the data reduction proxy. The Data Reduction proxy is not allowed to depend
on content/, because it is used by iOS. If dependencies on content/ need to be
added to the Data Reduction Proxy, it will have to be make into a layered
component. See
http://www.chromium.org/developers/design-documents/layered-components-design
for more information.