media: Implement zero-copy video playback for VP8.

media/renderers/default_renderer_factory.cc

Index: media/renderers/default_renderer_factory.cc
diff --git a/media/renderers/default_renderer_factory.cc b/media/renderers/default_renderer_factory.cc
index e09f90eb84ef4363702ee06f2908d4f88846f555..d50bd1171481a1a986052012f3301ba2c7ef9646 100644
--- a/media/renderers/default_renderer_factory.cc
+++ b/media/renderers/default_renderer_factory.cc
@@ -17,6 +17,7 @@
 #include "media/renderers/gpu_video_accelerator_factories.h"
 #include "media/renderers/renderer_impl.h"
 #include "media/renderers/video_renderer_impl.h"
+#include "media/video/gpu_memory_buffer_video_frame_pool.h"
 
 #if !defined(MEDIA_DISABLE_FFMPEG)
 #include "media/filters/ffmpeg_audio_decoder.h"
@@ -87,7 +88,14 @@ ScopedVector<VideoDecoder> DefaultRendererFactory::CreateVideoDecoders(
         new GpuVideoDecoder(gpu_factories, request_surface_cb));
 
 #if !defined(MEDIA_DISABLE_LIBVPX)
-  video_decoders.push_back(new VpxVideoDecoder());
+  std::unique_ptr<GpuMemoryBufferVideoFramePool> gpu_video_frame_pool;
+  if (gpu_factories &&
+      gpu_factories->ShouldUseGpuMemoryBuffersForVideoFrames()) {
+    gpu_video_frame_pool.reset(
+        new GpuMemoryBufferVideoFramePool(media_task_runner, gpu_factories));
+  }
+  video_decoders.push_back(
+      new VpxVideoDecoder(std::move(gpu_video_frame_pool)));
 #endif
 
 #if !defined(MEDIA_DISABLE_FFMPEG) && !defined(DISABLE_FFMPEG_VIDEO_DECODERS)