Add a GYP flag to enable coverage gathering instrumentation in ASan builds.

BUG=324216
R=glider@chromium.org

Review URL: https://codereview.chromium.org/139263003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245091 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 245091
Log a warning when the initial blocking policy fetch times out.

This will help diagnosing bugs caused by the timeout. This change also
changes the UMA sampling of the times involved in the fetching process,
since UMA_HISTOGRAM_TIMES is clamped to a maximum sample of 10 seconds.

BUG=334107

Review URL: https://codereview.chromium.org/139293002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245092 0039d316-1c4b-4281-b951-d872f2087c98
Flag-flip of app-list-voice-search. Now it's on by default.

BUG=333914
R=xiyuan@chromium.org
TEST=manually

Review URL: https://codereview.chromium.org/139293007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245093 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 245093