Enable bleeding edge rendering fast paths for Silk benchmarks
    
New benchmarks:
- rasterize_and_record.fast_path.key_silk_cases
- rasterize_and_record_micro.fast_path.key_silk_cases
- smoothness.fast_path.key_silk_cases
- smoothness.fast_path_gpu_rasterization.key_silk_cases
- thread_times.fast_path.key_silk_cases

Review URL: https://codereview.chromium.org/183413002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255427 0039d316-1c4b-4281-b951-d872f2087c98
The Android team is deprecating pthread_cond_timedwait_monotonic in favor of the more standard pthread_condattr_getclock.

Update usage in Chromium such that it will use the standards based code path when it's present.
    
Bug:349865

Review URL: https://codereview.chromium.org/183763031

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255428 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 255428
Use a sound pool instead of a single audio tag.

BUG=339320

Review URL: https://codereview.chromium.org/183893033

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255429 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 255429