Reduce number of active codecs on low end devices.

media/gpu/android_video_decode_accelerator.h

Index: media/gpu/android_video_decode_accelerator.h
diff --git a/media/gpu/android_video_decode_accelerator.h b/media/gpu/android_video_decode_accelerator.h
index 8470efaa40a18870e08009a19cc27b3e10bd1ad4..ec04094ae0d5ded80ccb32c29fe7e10d8c4b4c32 100644
--- a/media/gpu/android_video_decode_accelerator.h
+++ b/media/gpu/android_video_decode_accelerator.h
@@ -143,7 +143,7 @@ class MEDIA_GPU_EXPORT AndroidVideoDecodeAccelerator
   // false on failure, and true if initialization was successful.  This includes
   // synchronous and asynchronous init; the AVDA might not yet have a codec on
   // success, but async init will at least be in progress.
-  bool InitializePictureBufferManager();
+  bool InitializePictureBufferManager(bool force_async_init);

[liberato (no reviews please), 2016/09/13 15:34:28]

i think that it's almost the same if one has InitializePictureBufferManager
check (and clear) |defer_surface_creation_|, rather than take an argument.

[DaleCurtis, 2016/09/15 23:03:55]

Good point. Done.

 
   // A part of destruction process that is sometimes postponed after the drain.
   void ActualDestroy();
@@ -374,6 +374,10 @@ class MEDIA_GPU_EXPORT AndroidVideoDecodeAccelerator
   // when the EOS buffer is received.
   bool codec_needs_reset_;
 
+  // True if surface creation and |picture_buffer_manager_| initialization has
+  // been defered until the first Decode() call.
+  bool defer_surface_creation_;
+
   // Copy of the VDA::Config we were given.
   Config config_;