Add the UI compositor to the Mac build

content/browser/aura/compositor_resize_lock.h

-// 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.
-
-#ifndef CONTENT_BROWSER_AURA_RESIZE_LOCK_AURA_H_
-#define CONTENT_BROWSER_AURA_RESIZE_LOCK_AURA_H_
-
-#include "base/memory/ref_counted.h"
-#include "base/memory/weak_ptr.h"
-#include "base/time/time.h"
-#include "content/browser/aura/resize_lock.h"
-
-namespace aura { class RootWindow; }
-
-namespace ui { class CompositorLock; }
-
-namespace content {
-
-// Used to prevent further resizes while a resize is pending.
-class CompositorResizeLock : public ResizeLock {
- public:
-  CompositorResizeLock(aura::RootWindow* root_window,
-                 const gfx::Size new_size,
-                 bool defer_compositor_lock,
-                 const base::TimeDelta& timeout);
-  virtual ~CompositorResizeLock();
-
-  virtual bool GrabDeferredLock() OVERRIDE;
-  virtual void UnlockCompositor() OVERRIDE;
-
- protected:
-  virtual void LockCompositor() OVERRIDE;
-  void CancelLock();
-
- private:
-  aura::RootWindow* root_window_;
-  scoped_refptr<ui::CompositorLock> compositor_lock_;
-  base::WeakPtrFactory<CompositorResizeLock> weak_ptr_factory_;
-  bool cancelled_;
-
-  DISALLOW_COPY_AND_ASSIGN(CompositorResizeLock);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_AURA_RESIZE_LOCK_AURA_H_