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

trunk/src/content/browser/compositor/image_transport_factory.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/image_transport_factory.h"
-
-#include "content/browser/compositor/gpu_process_transport_factory.h"
-#include "content/browser/compositor/no_transport_image_transport_factory.h"
-#include "ui/compositor/compositor.h"
-
-namespace content {
-
-namespace {
-ImageTransportFactory* g_factory = NULL;
-bool g_initialized_for_unit_tests = false;
-}
-
-// static
-void ImageTransportFactory::Initialize() {
-  DCHECK(!g_factory || g_initialized_for_unit_tests);
-  if (g_initialized_for_unit_tests)
-    return;
-  g_factory = new GpuProcessTransportFactory;
-  ui::ContextFactory::SetInstance(g_factory->AsContextFactory());
-}
-
-void ImageTransportFactory::InitializeForUnitTests(
-    scoped_ptr<ui::ContextFactory> test_factory) {
-  DCHECK(!g_factory);
-  DCHECK(!g_initialized_for_unit_tests);
-  g_initialized_for_unit_tests = true;
-  g_factory = new NoTransportImageTransportFactory(test_factory.Pass());
-  ui::ContextFactory::SetInstance(g_factory->AsContextFactory());
-}
-
-// static
-void ImageTransportFactory::Terminate() {
-  ui::ContextFactory::SetInstance(NULL);
-  delete g_factory;
-  g_factory = NULL;
-  g_initialized_for_unit_tests = false;
-}
-
-// static
-ImageTransportFactory* ImageTransportFactory::GetInstance() {
-  return g_factory;
-}
-
-}  // namespace content