Disable buffering in asan_symbolize.py
This should help some buildbots that are timing out otherwise.

BUG=323556
TBR=maruel@chromium.org
TEST=interactive_ui_tests pass on the Mac ASan 64 bots

Review URL: https://codereview.chromium.org/104233002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238657 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 238657
AndroidVideoEncodeAccelerator is born!

AVEA is the encode-side analogue of AndroidVideoDecodeAccelerator, or the
Android analogue of ExynosVideoEncodeAccelerator, depending on your POV.
Also included in this CL:
- MediaCodecBridge learns how to be an encoder, too.
- MediaCodecBridge::Start is sunk into Create since they were always called
  together.
- android.os.Log() is given an exception parameter instead of concatenating its
  .toString() (and losing its stacktrace!)
- MediaCodecBridge exposes its buffers to reduce unnecessary memcpy'ing

Performance impact: isolating encode performance by making Android decode only
240p and no audio send/receive with the following URLs:
z620/gprecise: https://apprtc.appspot.com/?video=maxHeight=240&audio=false&r=<ROOM>
Nexus5: https://apprtc.appspot.com/?video=minHeight=720,maxHeight=720,minWidth=1280,maxWidth=1280&audio=false&r=<ROOM>
All 4 cores are max'd are running at top speed (ondemand governor ramps them up
on its own with this workload).
SW encode: CPU utilization 80% and desktop receives 0.1-0.5FPS (jankily).
HW encode: CPU utilization 60-70% and desktop receives 30FPS reliably.

Comparing an easier workload of encoding 360p:
z620/gprecise: https://apprtc.appspot.com/?video=maxHeight=240&audio=false&r=<ROOM>
Nexus5: https://apprtc.appspot.com/?video=minHeight=360,maxHeight=360,minWidth=640,maxWidth=640&audio=false&r=<ROOM>
Set all 4 cores to "performance" governor for stable comparison.
SW encode: CPU utilization 63% and desktop receives 30FPS reliably.
HW encode: CPU utilization 53% and desktop receives 30FPS reliably.

BUG=313115

Review URL: https://codereview.chromium.org/74563002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238658 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 238658