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..2901ca4f129a48d6fdec333a7e528b9d42ef9931 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.
 
@@ -8,10 +8,41 @@
 
 #include <string>
 
+#include "chrome/common/extensions/extension_permission_set.h"
 #include "chrome/browser/extensions/extension_prefs_scope.h"
 
+class Profile;
+
+namespace base {
+class ListValue;
+class DictionaryValue;
+};
+
+
 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);
+
+// Dispatches |event_name| to extensions listening to the event and holding
+// |permission|. |args| is passed as arguments to the event listener. If
+// |browser_pref| is not NULL, a level of control key-value for that pref is
+// injected into the first item of |args|, which must be of type
+// DictionaryValue.
+void DispatchEventToExtensions(
+    Profile* profile,
+    const std::string& event_name,
+    base::ListValue* args,
+    ExtensionAPIPermission::ID permission,
+    bool incognito,
+    const char* browser_pref);
 }
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_PREFERENCE_HELPERS_H_