Display an error message on usage settings page when proxy cannot be contacted.
Add data_reduction_proxy_usage_stats which keeps track of number of requests
completed through data reduction proxy vs number of requests eligible to use
data reduction proxy. Instantiate and set on io thread globals so that we can
pass it to chrome network delegate. Expose isDataReductionProxyUnreachable()
method to Android code through DataReductionProxySettings where it will be
used to decide whether to display the unreachable proxy message.
BUG=380195
Review URL: https://codereview.chromium.org/338273003
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@279222 0039d316-1c4b-4281-b951-d872f2087c98
18 files changed
