Add onFontNameChanged event to Font Settings API

chrome/browser/extensions/extension_preference_helpers.h

Index: chrome/browser/extensions/extension_preference_helpers.h
diff --git a/chrome/browser/extensions/extension_preference_helpers.h b/chrome/browser/extensions/extension_preference_helpers.h
index 70b28aae921ad9edbe810397fc78f1fa70352575..833b415f5bd3204909f341efd96bb1e705393c95 100644
--- a/chrome/browser/extensions/extension_preference_helpers.h
+++ b/chrome/browser/extensions/extension_preference_helpers.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -10,8 +10,18 @@
 
 #include "chrome/browser/extensions/extension_prefs_scope.h"
 
+class Profile;
+
 namespace extension_preference_helpers {
 bool StringToScope(const std::string& s, ExtensionPrefsScope* scope);
+
+// Returns a string constant (defined in the API) indicating the level of
+// control this extension has over the specified preference.
+const char* GetLevelOfControl(
+    Profile* profile,
+    const std::string& extension_id,
+    const std::string& browser_pref,
+    bool incognito);
 }
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_PREFERENCE_HELPERS_H_