Removing WebRTC.Audio(Capture|Render)Time histograms. No longer needed.

BUG=none

Review URL: https://codereview.chromium.org/179813003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@253363 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 253363
Modify the via header string for Google Instant feature.

Review URL: https://codereview.chromium.org/171233006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@253364 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 253364