Remove the implicit wrench menu items for browser actions.

chrome/renderer/resources/extension_process_bindings.js

 // Copyright (c) 2009 The chrome Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This script contains privileged chrome extension related javascript APIs.
 // It is loaded by pages whose URL has the chrome-extension protocol.
 
 var chrome = chrome || {};
 (function() {
   native function GetExtensionAPIDefinition();
@@ skipping 331 matching lines @@
         // constructor is not public.
         //
         // We do this manually instead of using JSONSchema to avoid having these
         // properties show up in the doc.
         if (!("width" in details.imageData) ||
             !("height" in details.imageData) ||
             !("data" in details.imageData)) {
           throw new Error(
               "The imageData property must contain an ImageData object.");
         }
+
         sendCustomRequest(SetBrowserActionIcon, "browserAction.setIcon",
                           details, this.definition.parameters);
       } else {
         throw new Error(
             "Either the iconIndex or imageData property must be specified.");
       }
     }
 
     setupBrowserActionEvent(extensionId);
     setupPageActionEvents(extensionId);
     setupToolstripEvents(GetRenderViewId());
   });
 })();