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

content/browser/devtools/devtools_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 CONTENT_BROWSER_DEVTOOLS_DEVTOOLS_MANAGER_H_
 #define CONTENT_BROWSER_DEVTOOLS_DEVTOOLS_MANAGER_H_
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/memory/singleton.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/devtools_manager_delegate.h"
 
 namespace content {
 
 class DevToolsAgentHostImpl;
 
 // This class is a singleton that manage global DevTools state for the whole
 // browser.
@@ skipping 16 matching lines @@
 
   scoped_ptr<DevToolsManagerDelegate> delegate_;
   int attached_hosts_count_;
 
   DISALLOW_COPY_AND_ASSIGN(DevToolsManager);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DEVTOOLS_DEVTOOLS_MANAGER_H_