[Extensions] Implement chrome.runtime.openOptionsPage.

chrome/browser/extensions/extension_tab_util.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_TAB_UTIL_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_TAB_UTIL_H_
 
 #include <string>
 
 #include "base/callback.h"
@@ skipping 153 matching lines @@
                         const gfx::Rect& initial_rect,
                         bool user_gesture);
 
   // Executes the specified callback for all tabs in all browser windows.
   static void ForEachTab(
       const base::Callback<void(content::WebContents*)>& callback);
 
   static WindowController* GetWindowControllerOfTab(
       const content::WebContents* web_contents);
 
-  // Open the extension's options page.
-  static void OpenOptionsPage(const Extension* extension, Browser* browser);
+  // Open the extension's options page. Returns true if an options page was
+  // successfully opened (though it may not necessarily *load*, e.g. if the
+  // URL does not exist).
+  static bool OpenOptionsPage(const Extension* extension, Browser* browser);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_TAB_UTIL_H_