Revert 245131 "Add the UI compositor to the Mac build", which caused Mac ASan redness

trunk/src/content/browser/compositor/owned_mailbox.cc

-// Copyright 2014 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/browser/compositor/owned_mailbox.h"
-
-#include "base/logging.h"
-#include "content/browser/compositor/image_transport_factory.h"
-#include "content/common/gpu/client/gl_helper.h"
-
-namespace content {
-
-OwnedMailbox::OwnedMailbox(GLHelper* gl_helper)
-    : texture_id_(0), sync_point_(0), gl_helper_(gl_helper) {
-  texture_id_ = gl_helper_->CreateTexture();
-  mailbox_ = gl_helper_->ProduceMailboxFromTexture(texture_id_, &sync_point_);
-  ImageTransportFactory::GetInstance()->AddObserver(this);
-}
-
-OwnedMailbox::~OwnedMailbox() {
-  if (gl_helper_)
-    Destroy();
-}
-
-void OwnedMailbox::UpdateSyncPoint(uint32 sync_point) {
-  if (sync_point)
-    sync_point_ = sync_point;
-}
-
-void OwnedMailbox::Destroy() {
-  ImageTransportFactory::GetInstance()->RemoveObserver(this);
-  gl_helper_->WaitSyncPoint(sync_point_);
-  gl_helper_->DeleteTexture(texture_id_);
-  texture_id_ = 0;
-  mailbox_ = gpu::Mailbox();
-  sync_point_ = 0;
-  gl_helper_ = NULL;
-}
-
-void OwnedMailbox::OnLostResources() {
-  if (gl_helper_)
-    Destroy();
-}
-
-}  // namespace content