Move content settings extension API to content_settings dir.

chrome/browser/extensions/extension_prefs.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 CHROME_BROWSER_EXTENSIONS_EXTENSION_PREFS_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_PREFS_H_
 #pragma once
 
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/memory/linked_ptr.h"
 #include "base/time.h"
 #include "base/values.h"
-#include "chrome/browser/extensions/extension_content_settings_store.h"
+#include "chrome/browser/content_settings/extension_content_settings_store.h"
 #include "chrome/browser/extensions/extension_prefs_scope.h"
 #include "chrome/browser/extensions/extension_scoped_prefs.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/string_ordinal.h"
 
 class ExtensionPrefValueMap;
 class ExtensionSorting;
 class PrefService;
 class URLPatternSet;
 
@@ skipping 509 matching lines @@
   // Contains all the logic for handling the order for various extension
   // properties.
   scoped_ptr<ExtensionSorting> extension_sorting_;
 
   scoped_refptr<ExtensionContentSettingsStore> content_settings_store_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionPrefs);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_PREFS_H_