Add the UI compositor to the Mac build

content/browser/aura/compositor_resize_lock.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/browser/aura/compositor_resize_lock.h"
-
-#include "base/debug/trace_event.h"
-#include "content/public/browser/browser_thread.h"
-#include "ui/aura/root_window.h"
-#include "ui/compositor/compositor.h"
-
-namespace content {
-
-CompositorResizeLock::CompositorResizeLock(aura::RootWindow* root_window,
-                                           const gfx::Size new_size,
-                                           bool defer_compositor_lock,
-                                           const base::TimeDelta& timeout)
-    : ResizeLock(new_size, defer_compositor_lock),
-      root_window_(root_window),
-      weak_ptr_factory_(this),
-      cancelled_(false) {
-  DCHECK(root_window_);
-
-  TRACE_EVENT_ASYNC_BEGIN2("ui", "CompositorResizeLock", this,
-                           "width", expected_size().width(),
-                           "height", expected_size().height());
-  root_window_->HoldPointerMoves();
-
-  BrowserThread::PostDelayedTask(
-      BrowserThread::UI, FROM_HERE,
-      base::Bind(&CompositorResizeLock::CancelLock,
-                 weak_ptr_factory_.GetWeakPtr()),
-      timeout);
-}
-
-CompositorResizeLock::~CompositorResizeLock() {
-  CancelLock();
-  TRACE_EVENT_ASYNC_END2("ui", "CompositorResizeLock", this,
-                         "width", expected_size().width(),
-                         "height", expected_size().height());
-}
-
-bool CompositorResizeLock::GrabDeferredLock() {
-  return ResizeLock::GrabDeferredLock();
-}
-
-void CompositorResizeLock::UnlockCompositor() {
-  ResizeLock::UnlockCompositor();
-  compositor_lock_ = NULL;
-}
-
-void CompositorResizeLock::LockCompositor() {
-  ResizeLock::LockCompositor();
-  compositor_lock_ = root_window_->host()->compositor()->GetCompositorLock();
-}
-
-void CompositorResizeLock::CancelLock() {
-  if (cancelled_)
-    return;
-  cancelled_ = true;
-  UnlockCompositor();
-  root_window_->ReleasePointerMoves();
-}
-
-}  // namespace content