Make the experimental AGC work on Chrome by default.

The experimental AGC will use Get/SetMicrophoneVolume() instead of getting/setting volume via callback. Also, SetAgc() does not work when the experimental AGC is enabled by default in libjingle due to some racing problem between enabling the new AGC and disabling the old AGC.

This CL fix the problem by making sure the capture enable AGC by default and let the track to decide if it should use the volume information.

BUG=297985
TEST=?

Review URL: https://codereview.chromium.org/25515003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232506 0039d316-1c4b-4281-b951-d872f2087c98
cc: Allow PicturePile tests to unset debug canvas clearing

This is a followup to https://codereview.chromium.org/51433003/.
Without this, it's hard to write tests that verify raster behavior
because the debug canvas clearing sets all the bitmap pixels to some
arbitrary debug color before doing any rastering.

R=brianderson@chromium.org
BUG=none

Review URL: https://codereview.chromium.org/47603018

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232507 0039d316-1c4b-4281-b951-d872f2087c98
Strings for the upcoming Open In Chrome behavior.

BUG=148492
TEST=none

Review URL: https://codereview.chromium.org/50433004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232508 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 232507
Only add alias URLs to a prerender on navigation commit.

Delay adding alias URLs from both provisional loads and redirects until that
point.

BUG=313435
TEST=PrerenderBrowserTest.PrerenderNoCommitNoSwap2

Review URL: https://codereview.chromium.org/54843003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232509 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 232509
Fix Mac ASAN compile error by including appropriate header.

std::max was used but <algorithm> was not included.

TBR=dewittj@chromium.org
BUG=NONE

Review URL: https://codereview.chromium.org/55913005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232510 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 232510