cc: Rationalize sync points and lost status for returned resources

cc/layers/texture_layer.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/layers/texture_layer.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/location.h"
 #include "base/synchronization/lock.h"
@@ skipping 282 matching lines @@
   holder_->InternalRelease();
 }
 
 TextureLayer::MailboxHolder::MailboxHolder(
     const TextureMailbox& mailbox,
     scoped_ptr<SingleReleaseCallback> release_callback)
     : message_loop_(BlockingTaskRunner::current()),
       internal_references_(0),
       mailbox_(mailbox),
       release_callback_(release_callback.Pass()),
-      sync_point_(mailbox.sync_point()),
-      is_lost_(false) {
-}
+      sync_point_(0),
+      is_lost_(false) {}
 
 TextureLayer::MailboxHolder::~MailboxHolder() {
   DCHECK_EQ(0u, internal_references_);
 }
 
 scoped_ptr<TextureLayer::MailboxHolder::MainThreadReference>
 TextureLayer::MailboxHolder::Create(
     const TextureMailbox& mailbox,
     scoped_ptr<SingleReleaseCallback> release_callback) {
   return scoped_ptr<MainThreadReference>(new MainThreadReference(
@@ skipping 30 matching lines @@
 }
 
 void TextureLayer::MailboxHolder::ReturnAndReleaseOnImplThread(
     unsigned sync_point, bool is_lost) {
   Return(sync_point, is_lost);
   message_loop_->PostTask(FROM_HERE,
                           base::Bind(&MailboxHolder::InternalRelease, this));
 }
 
 }  // namespace cc