Improve GL shader YUV adjustment.

cc/resources/video_resource_updater.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/resources/video_resource_updater.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 134 matching lines @@
   DCHECK_EQ(ref_count_, 1);
   plane_index_ = plane_index;
   unique_frame_id_ = unique_frame_id;
   has_unique_frame_id_and_plane_index_ = true;
 }
 
 VideoFrameExternalResources::VideoFrameExternalResources()
     : type(NONE),
       read_lock_fences_enabled(false),
       offset(0.0f),
-      multiplier(1.0f) {}
+      multiplier(1.0f),
+      bits_per_channel(8) {}
 
 VideoFrameExternalResources::VideoFrameExternalResources(
     const VideoFrameExternalResources& other) = default;
 
 VideoFrameExternalResources::~VideoFrameExternalResources() {}
 
 VideoResourceUpdater::VideoResourceUpdater(ContextProvider* context_provider,
                                            ResourceProvider* resource_provider)
     : context_provider_(context_provider),
       resource_provider_(resource_provider) {
@@ skipping 202 matching lines @@
 
   if (plane_resources.size() != output_plane_count) {
     // Allocation failed, nothing will be returned so restore reference counts.
     for (ResourceList::iterator resource_it : plane_resources)
       resource_it->remove_ref();
     return VideoFrameExternalResources();
   }
 
   VideoFrameExternalResources external_resources;
 
+  external_resources.bits_per_channel = bits_per_channel;
+
   if (software_compositor) {
     DCHECK_EQ(plane_resources.size(), 1u);
     PlaneResource& plane_resource = *plane_resources[0];
     DCHECK_EQ(plane_resource.resource_format(), kRGBResourceFormat);
     DCHECK(plane_resource.mailbox().IsZero());
 
     if (!plane_resource.Matches(video_frame->unique_id(), 0)) {
       // We need to transfer data from |video_frame| to the plane resource.
       if (!video_renderer_)
         video_renderer_.reset(new media::SkCanvasVideoRenderer);
@@ skipping 304 matching lines @@
   if (lost_resource) {
     resource_it->clear_refs();
     updater->DeleteResource(resource_it);
     return;
   }
 
   resource_it->remove_ref();
 }
 
 }  // namespace cc