Don't require VDAs to return all PictureBuffers at once.

content/common/gpu/media/android_copying_backing_strategy.h

Index: content/common/gpu/media/android_copying_backing_strategy.h
diff --git a/content/common/gpu/media/android_copying_backing_strategy.h b/content/common/gpu/media/android_copying_backing_strategy.h
index 4cb1f622a5a30f1f2c46eddd1e17f6a8a4de9a75..15be76d8be7324a393e9219d00fc3aa02b330f5e 100644
--- a/content/common/gpu/media/android_copying_backing_strategy.h
+++ b/content/common/gpu/media/android_copying_backing_strategy.h
@@ -32,7 +32,6 @@ class CONTENT_EXPORT AndroidCopyingBackingStrategy
   // AndroidVideoDecodeAccelerator::BackingStrategy
   void Initialize(AVDAStateProvider*) override;
   void Cleanup(const AndroidVideoDecodeAccelerator::OutputBufferMap&) override;
-  uint32 GetNumPictureBuffers() const override;
   uint32 GetTextureTarget() const override;
   scoped_refptr<gfx::SurfaceTexture> CreateSurfaceTexture() override;
   void UseCodecBufferForPictureBuffer(int32 codec_buffer_index,
@@ -41,6 +40,11 @@ class CONTENT_EXPORT AndroidCopyingBackingStrategy
       media::VideoCodecBridge*,
       const AndroidVideoDecodeAccelerator::OutputBufferMap&) override;
 
+  static media::VideoDecodeAccelerator::Capabilities::Flags
+  GetCapabilitiesFlags() {
+    return media::VideoDecodeAccelerator::Capabilities::NO_FLAGS;
+  }
+
  private:
   // Used for copy the texture from surface texture to picture buffers.
   scoped_ptr<gpu::CopyTextureCHROMIUMResourceManager> copier_;