ReleaseOutputBuffer to surface back and front buffers where possible.

content/common/gpu/media/android_video_decode_accelerator.h

Index: content/common/gpu/media/android_video_decode_accelerator.h
diff --git a/content/common/gpu/media/android_video_decode_accelerator.h b/content/common/gpu/media/android_video_decode_accelerator.h
index cdcbc4d0fa7c113acd3a6521fdf8d912a2faeaee..dec3efcbe72adf12ce8003c884fb6aaf9e42a90d 100644
--- a/content/common/gpu/media/android_video_decode_accelerator.h
+++ b/content/common/gpu/media/android_video_decode_accelerator.h
@@ -91,6 +91,9 @@ class CONTENT_EXPORT AndroidVideoDecodeAccelerator
     virtual void ReleaseCodecBuffers(
         const AndroidVideoDecodeAccelerator::OutputBufferMap& buffers) {}
 
+    // Attempts to free up codec output buffers by rendering early.
+    virtual void MaybeRenderEarly() {}
+
     // Notify strategy that we have a new android MediaCodec instance.  This
     // happens when we're starting up or re-configuring mid-stream.  Any
     // previously provided codec should no longer be referenced.