Move ExtensionPrefs and friends to extensions/ directory.

extensions/browser/extension_scoped_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_SCOPED_PREFS_H_
-#define CHROME_BROWSER_EXTENSIONS_EXTENSION_SCOPED_PREFS_H_
+#ifndef EXTENSIONS_BROWSER_EXTENSION_SCOPED_PREFS_H_
+#define EXTENSIONS_BROWSER_EXTENSION_SCOPED_PREFS_H_
 
 namespace extensions {
 
 class ExtensionScopedPrefs {
  public:
   ExtensionScopedPrefs() {}
   ~ExtensionScopedPrefs() {}
 
   // Sets the pref |key| for extension |id| to |value|.
   virtual void UpdateExtensionPref(const std::string& id,
@@ skipping 29 matching lines @@
       const std::string& pref_key,
       const base::DictionaryValue** out_value) const = 0;
 
   // Returns true if the prefs contain an entry for an extension with id
   // |extension_id|.
   virtual bool HasPrefForExtension(const std::string& extension_id) const = 0;
 };
 
 }  // namespace extensions
 
-#endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_SCOPED_PREFS_H_
+#endif  // EXTENSIONS_BROWSER_EXTENSION_SCOPED_PREFS_H_