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

media/renderers/gpu_video_accelerator_factories.h

Index: media/renderers/gpu_video_accelerator_factories.h
diff --git a/media/renderers/gpu_video_accelerator_factories.h b/media/renderers/gpu_video_accelerator_factories.h
index 329f4b4e1a69882bf881a7e352cf4452623d04fc..3665a99f80049fff44aca138a4602352364282a2 100644
--- a/media/renderers/gpu_video_accelerator_factories.h
+++ b/media/renderers/gpu_video_accelerator_factories.h
@@ -97,6 +97,10 @@ class MEDIA_EXPORT GpuVideoAcceleratorFactories {
   // Returns the task runner the video accelerator runs on.
   virtual scoped_refptr<base::SingleThreadTaskRunner> GetTaskRunner() = 0;
 
+  // Return the capabilities of video decode accelerator.
+  virtual VideoDecodeAccelerator::Capabilities
+  GetVideoDecodeAcceleratorCapabilities() = 0;
+
   // Returns the supported codec profiles of video decode accelerator.
   virtual VideoDecodeAccelerator::SupportedProfiles
       GetVideoDecodeAcceleratorSupportedProfiles() = 0;