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

content/public/browser/background_tracing_manager.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_MANAGER_H_
 #define CONTENT_PUBLIC_BROWSER_BACKGROUND_TRACING_MANAGER_H_
 
+#include "base/memory/scoped_ptr.h"
 #include "base/trace_event/trace_event_impl.h"
 #include "base/values.h"
 #include "content/common/content_export.h"
 
 namespace content {
 class BackgroundTracingConfig;
 struct BackgroundTracingUploadConfig;
 
 // BackgroundTracingManager is used on the browser process to trigger the
 // collection of trace data and upload the results. Only the browser UI thread
@@ skipping 76 matching lines @@
       const base::Closure& callback) = 0;
   virtual void FireTimerForTesting() = 0;
 
  protected:
   virtual ~BackgroundTracingManager() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_BACKGROUND_TRACING_MANAGER_H_