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

cc/scheduler/scheduler_settings.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 CC_SCHEDULER_SCHEDULER_SETTINGS_H_
 #define CC_SCHEDULER_SCHEDULER_SETTINGS_H_
 
 #include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 #include "base/values.h"
 #include "cc/base/cc_export.h"
 
 namespace base {
 namespace trace_event {
 class ConvertableToTraceFormat;
 }
 }
 
@@ skipping 16 matching lines @@
 
   int maximum_number_of_failed_draws_before_draw_is_forced;
   base::TimeDelta background_frame_interval;
 
   scoped_ptr<base::trace_event::ConvertableToTraceFormat> AsValue() const;
 };
 
 }  // namespace cc
 
 #endif  // CC_SCHEDULER_SCHEDULER_SETTINGS_H_