Add distinction between RGB and RGBA native texture video frames and resources

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 <algorithm>
 
 #include "base/bind.h"
 #include "base/trace_event/trace_event.h"
@@ skipping 394 matching lines @@
   if (frame_format != media::VideoFrame::NATIVE_TEXTURE)
       return VideoFrameExternalResources();
 
   if (!context_provider_)
     return VideoFrameExternalResources();
 
   const gpu::MailboxHolder* mailbox_holder = video_frame->mailbox_holder();
   VideoFrameExternalResources external_resources;
   switch (mailbox_holder->texture_target) {
     case GL_TEXTURE_2D:
-      external_resources.type = VideoFrameExternalResources::RGB_RESOURCE;
+      if (video_frame->has_alpha())
+        external_resources.type = VideoFrameExternalResources::RGBA_RESOURCE;
+      else
+        external_resources.type = VideoFrameExternalResources::RGB_RESOURCE;
       break;
     case GL_TEXTURE_EXTERNAL_OES:
       external_resources.type =
           VideoFrameExternalResources::STREAM_TEXTURE_RESOURCE;
       break;
     case GL_TEXTURE_RECTANGLE_ARB:
       external_resources.type = VideoFrameExternalResources::IO_SURFACE;
       break;
     default:
       NOTREACHED();
@@ skipping 40 matching lines @@
     resource_it->ref_count = 0;
     updater->DeleteResource(resource_it);
     return;
   }
 
   --resource_it->ref_count;
   DCHECK_GE(resource_it->ref_count, 0);
 }
 
 }  // namespace cc