16 bit capture and GPU&CPU memory buffer support.

content/renderer/media/renderer_gpu_video_accelerator_factories.cc

Index: content/renderer/media/renderer_gpu_video_accelerator_factories.cc
diff --git a/content/renderer/media/renderer_gpu_video_accelerator_factories.cc b/content/renderer/media/renderer_gpu_video_accelerator_factories.cc
index 022d7bfa96d4552522600dbd30459fad04a06da7..9c60d872312c68f9741bfd902d95459c7626d59d 100644
--- a/content/renderer/media/renderer_gpu_video_accelerator_factories.cc
+++ b/content/renderer/media/renderer_gpu_video_accelerator_factories.cc
@@ -246,12 +246,15 @@ unsigned RendererGpuVideoAcceleratorFactories::ImageTextureTarget(
 }
 
 media::VideoPixelFormat
-RendererGpuVideoAcceleratorFactories::VideoFrameOutputFormat() {
+RendererGpuVideoAcceleratorFactories::VideoFrameOutputFormat(
+    media::VideoPixelFormat format) {
   DCHECK(task_runner_->BelongsToCurrentThread());
   if (CheckContextLost())
     return media::PIXEL_FORMAT_UNKNOWN;
   cc::ContextProvider::ScopedContextLock lock(context_provider_);
   auto capabilities = context_provider_->ContextCapabilities();
+  if (format == media::PIXEL_FORMAT_Y16)
+    return capabilities.texture_rg ? format : media::PIXEL_FORMAT_UNKNOWN;
   if (capabilities.image_ycbcr_420v)
     return media::PIXEL_FORMAT_NV12;
   if (capabilities.image_ycbcr_422)