Add gpu::MailboxHolder to hold state for a gpu::Mailbox

content/renderer/media/webmediaplayer_impl.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 "content/renderer/media/webmediaplayer_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <string>
 #include <vector>
@@ skipping 619 matching lines @@
     base::AutoLock auto_lock(lock_);
     video_frame = current_frame_;
   }
 
   TRACE_EVENT0("media", "WebMediaPlayerImpl:copyVideoTextureToPlatformTexture");
 
   if (!video_frame)
     return false;
   if (video_frame->format() != media::VideoFrame::NATIVE_TEXTURE)
     return false;
-  if (video_frame->texture_target() != GL_TEXTURE_2D)
+
+  gpu::MailboxHolder* mailbox_holder = video_frame->mailbox_holder();
+  if (mailbox_holder->target() != GL_TEXTURE_2D)
     return false;
 
   // Since this method changes which texture is bound to the TEXTURE_2D target,
   // ideally it would restore the currently-bound texture before returning.
   // The cost of getIntegerv is sufficiently high, however, that we want to
   // avoid it in user builds. As a result assume (below) that |texture| is
   // bound when this method is called, and only verify this fact when
   // DCHECK_IS_ON.
   if (DCHECK_IS_ON()) {
     GLint bound_texture = 0;
     web_graphics_context->getIntegerv(GL_TEXTURE_BINDING_2D, &bound_texture);
     DCHECK_EQ(static_cast<GLuint>(bound_texture), texture);
   }
 
-  media::VideoFrame::MailboxHolder* mailbox_holder =
-      video_frame->texture_mailbox();
-
   uint32 source_texture = web_graphics_context->createTexture();
 
   web_graphics_context->waitSyncPoint(mailbox_holder->sync_point());
   web_graphics_context->bindTexture(GL_TEXTURE_2D, source_texture);
   web_graphics_context->consumeTextureCHROMIUM(GL_TEXTURE_2D,
                                                mailbox_holder->mailbox().name);
 
   // The video is stored in a unmultiplied format, so premultiply
   // if necessary.
   web_graphics_context->pixelStorei(GL_UNPACK_PREMULTIPLY_ALPHA_CHROMIUM,
@@ skipping 654 matching lines @@
   // The |current_frame_| wasn't painted, it is being replaced, and we haven't
   // even gotten the chance to request a repaint for it yet. Mark it as dropped.
   TRACE_EVENT0("media", "WebMediaPlayerImpl:frameDropped");
   DVLOG(1) << "Frame dropped before being painted: "
            << current_frame_->GetTimestamp().InSecondsF();
   if (frames_dropped_before_paint_ < kuint32max)
     frames_dropped_before_paint_++;
 }
 
 }  // namespace content