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

content/public/browser/background_tracing_config.h

 // Copyright 2015 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_PUBLIC_BROWSER_BACKGROUND_TRACING_CONFIG_H_
 #define CONTENT_PUBLIC_BROWSER_BACKGROUND_TRACING_CONFIG_H_
 
+#include "base/memory/scoped_ptr.h"
 #include "base/trace_event/trace_event_impl.h"
 #include "content/common/content_export.h"
 
 namespace base {
 class DictionaryValue;
 }
 
 namespace content {
 
 // BackgroundTracingConfig is passed to the BackgroundTracingManager to
@@ skipping 16 matching lines @@
  private:
   friend class BackgroundTracingConfigImpl;
   explicit BackgroundTracingConfig(TracingMode tracing_mode);
 
   const TracingMode tracing_mode_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_BACKGROUND_TRACING_CONFIG_H_