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

cc/output/gl_renderer.cc

 // Copyright 2010 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/output/gl_renderer.h"
 
 #include <algorithm>
 #include <limits>
 #include <set>
 #include <string>
@@ skipping 2333 matching lines @@
 
     gpu::Mailbox mailbox;
     if (own_mailbox) {
       GLC(context_, context_->genMailboxCHROMIUM(mailbox.name));
       if (mailbox.IsZero()) {
         context_->deleteTexture(texture_id);
         request->SendEmptyResult();
         return;
       }
     } else {
-      mailbox = request->texture_mailbox().name();
+      mailbox = request->texture_mailbox().mailbox();
       DCHECK_EQ(static_cast<unsigned>(GL_TEXTURE_2D),
                 request->texture_mailbox().target());
       DCHECK(!mailbox.IsZero());
       unsigned incoming_sync_point = request->texture_mailbox().sync_point();
       if (incoming_sync_point)
         GLC(context_, context_->waitSyncPoint(incoming_sync_point));
     }
 
     GLC(context_, context_->bindTexture(GL_TEXTURE_2D, texture_id));
     if (own_mailbox) {
@@ skipping 820 matching lines @@
   // The Skia GPU backend requires a stencil buffer.  See ReinitializeGrCanvas
   // implementation.
   return gr_context_ && context_->getContextAttributes().stencil;
 }
 
 bool GLRenderer::IsContextLost() {
   return output_surface_->context_provider()->IsContextLost();
 }
 
 }  // namespace cc