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

extensions/browser/extension_pref_value_map.h

 // Copyright 2014 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 EXTENSIONS_BROWSER_EXTENSION_PREF_VALUE_MAP_H_
 #define EXTENSIONS_BROWSER_EXTENSION_PREF_VALUE_MAP_H_
 
 #include <map>
 #include <set>
 #include <string>
 
 #include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
 #include "components/keyed_service/core/keyed_service.h"
 #include "extensions/browser/extension_prefs_scope.h"
 
 class PrefValueMap;
 
 namespace base {
 class Time;
 class Value;
 }
@@ skipping 178 matching lines @@
   // being destroyed. In tests, it isn't called, so the notification must
   // be done in the destructor. This bit tracks whether it has been done yet.
   bool destroyed_;
 
   base::ObserverList<Observer, true> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionPrefValueMap);
 };
 
 #endif  // EXTENSIONS_BROWSER_EXTENSION_PREF_VALUE_MAP_H_