Fix a bunch of IWYU violators that don't include scoped_ptr.h

ui/gl/gpu_switching_manager.h

 // Copyright (c) 2012 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 UI_GL_GPU_SWITCHING_MANAGER_H_
 #define UI_GL_GPU_SWITCHING_MANAGER_H_
 
 #include <stdint.h>
 
 #include <vector>
 
 #include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/memory/singleton.h"
 #include "base/observer_list.h"
 #include "build/build_config.h"
 #include "ui/gl/gl_export.h"
 #include "ui/gl/gpu_preference.h"
 #include "ui/gl/gpu_switching_observer.h"
 
 namespace ui {
 
 class GL_EXPORT GpuSwitchingManager {
@@ skipping 53 matching lines @@
   scoped_ptr<PlatformSpecific> platform_specific_;
 
   base::ObserverList<GpuSwitchingObserver> observer_list_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuSwitchingManager);
 };
 
 }  // namespace ui
 
 #endif  // UI_GL_GPU_SWITCHING_MANAGER_H_