Improve GL shader YUV adjustment.

cc/layers/video_layer_impl.cc

Index: cc/layers/video_layer_impl.cc
diff --git a/cc/layers/video_layer_impl.cc b/cc/layers/video_layer_impl.cc
index 299c446ff609f621438cd36d0536f804f3b56460..7d35a13027278d65849706df5b1385cd212b08e9 100644
--- a/cc/layers/video_layer_impl.cc
+++ b/cc/layers/video_layer_impl.cc
@@ -120,6 +120,7 @@ bool VideoLayerImpl::WillDraw(DrawMode draw_mode,
   }
   frame_resource_offset_ = external_resources.offset;
   frame_resource_multiplier_ = external_resources.multiplier;
+  frame_bits_per_channel_ = external_resources.bits_per_channel;
 
   DCHECK_EQ(external_resources.mailboxes.size(),
             external_resources.release_callbacks.size());
@@ -281,7 +282,8 @@ void VideoLayerImpl::AppendQuads(RenderPass* render_pass,
           frame_resources_.size() > 2 ? frame_resources_[2].id
                                       : frame_resources_[1].id,
           frame_resources_.size() > 3 ? frame_resources_[3].id : 0, color_space,
-          frame_resource_offset_, frame_resource_multiplier_);
+          frame_resource_offset_, frame_resource_multiplier_,
+          frame_bits_per_channel_);
       ValidateQuadResources(yuv_video_quad);
       break;
     }