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

gpu/config/gpu_info.h

Index: gpu/config/gpu_info.h
diff --git a/gpu/config/gpu_info.h b/gpu/config/gpu_info.h
index d6f61fd60f79e027655477675c041937c3919cd0..cef5ae2a674bf345b924cc8f1da6845ff6315084 100644
--- a/gpu/config/gpu_info.h
+++ b/gpu/config/gpu_info.h
@@ -60,9 +60,17 @@ struct GPU_EXPORT VideoDecodeAcceleratorSupportedProfile {
   gfx::Size max_resolution;
   gfx::Size min_resolution;
 };
+
 using VideoDecodeAcceleratorSupportedProfiles =
     std::vector<VideoDecodeAcceleratorSupportedProfile>;
 
+struct GPU_EXPORT VideoDecodeAcceleratorCapabilities {
+  VideoDecodeAcceleratorCapabilities();
+  ~VideoDecodeAcceleratorCapabilities();
+  VideoDecodeAcceleratorSupportedProfiles supported_profiles;
+  uint32 flags;
+};
+
 // Specification of an encoding profile supported by a hardware encoder.
 struct GPU_EXPORT VideoEncodeAcceleratorSupportedProfile {
   VideoCodecProfile profile;
@@ -220,8 +228,7 @@ struct GPU_EXPORT GPUInfo {
   DxDiagNode dx_diagnostics;
 #endif
 
-  VideoDecodeAcceleratorSupportedProfiles
-      video_decode_accelerator_supported_profiles;
+  VideoDecodeAcceleratorCapabilities video_decode_accelerator_capabilities;
   VideoEncodeAcceleratorSupportedProfiles
       video_encode_accelerator_supported_profiles;
   bool jpeg_decode_accelerator_supported;