Start using deferred rendering for WebView on L.

media/filters/gpu_video_decoder.cc

Index: media/filters/gpu_video_decoder.cc
diff --git a/media/filters/gpu_video_decoder.cc b/media/filters/gpu_video_decoder.cc
index 260bfaabb3e6777e42f6d3a823589101190ae587..653f013ae6b11f711e5dccb38f8cbb220eb9a258 100644
--- a/media/filters/gpu_video_decoder.cc
+++ b/media/filters/gpu_video_decoder.cc
@@ -80,6 +80,7 @@ GpuVideoDecoder::GpuVideoDecoder(GpuVideoAcceleratorFactories* factories,
       next_bitstream_buffer_id_(0),
       available_pictures_(0),
       needs_all_picture_buffers_to_decode_(false),
+      copy_required_(false),
       weak_factory_(this) {
   DCHECK(factories_);
 }
@@ -180,6 +181,9 @@ void GpuVideoDecoder::Initialize(const VideoDecoderConfig& config,
   needs_all_picture_buffers_to_decode_ =
       capabilities.flags &
       VideoDecodeAccelerator::Capabilities::NEEDS_ALL_PICTURE_BUFFERS_TO_DECODE;
+  copy_required_ = (capabilities.flags &
+                    VideoDecodeAccelerator::Capabilities::COPY_REQUIRED) ==
+                   VideoDecodeAccelerator::Capabilities::COPY_REQUIRED;
   needs_bitstream_conversion_ = (config.codec() == kCodecH264);
   output_cb_ = BindToCurrentLoop(output_cb);
 
@@ -516,6 +520,8 @@ void GpuVideoDecoder::PictureReady(const media::Picture& picture) {
   }
   if (picture.allow_overlay())
     frame->metadata()->SetBoolean(VideoFrameMetadata::ALLOW_OVERLAY, true);
+  if (copy_required_)
+    frame->metadata()->SetBoolean(VideoFrameMetadata::COPY_REQUIRED, true);
   CHECK_GT(available_pictures_, 0);
   --available_pictures_;
   bool inserted =