Update page action manifest parsing to match the new format.

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 174 matching lines @@
     return function() {
       return func.apply(obj, arguments);
     };
   }
 
   // --- Setup additional api's not currently handled in common/extensions/api
 
   // Page action events send (pageActionId, {tabId, tabUrl}).
   function setupPageActionEvents(extensionId) {
     var pageActions = GetCurrentPageActions(extensionId);
-    var eventName = "";
+    var eventName = "pageAction/" + extensionId;
+    // TODO(EXTENSIONS_DEPRECATED): only one page action
     for (var i = 0; i < pageActions.length; ++i) {
-      eventName = extensionId + "/" + pageActions[i];
       // Setup events for each extension_id/page_action_id string we find.
       chrome.pageActions[pageActions[i]] = new chrome.Event(eventName);
     }
+    chrome.pageAction = chrome.pageAction || {};
+    chrome.pageAction.onClicked = new chrome.Event(eventName);
   }
 
   // Browser action events send {windowpId}.
   function setupBrowserActionEvent(extensionId) {
     var eventName = "browserAction/" + extensionId;
     chrome.browserAction = chrome.browserAction || {};
     chrome.browserAction.onClicked = new chrome.Event(eventName);
   }
 
   function setupToolstripEvents(renderViewId) {
@@ skipping 128 matching lines @@
         sendCustomRequest(SetBrowserActionIcon, "browserAction.setIcon",
                           idOrImageData, this.definition.parameters);
       }
     }
 
     setupPageActionEvents(extensionId);
     setupBrowserActionEvent(extensionId);
     setupToolstripEvents(GetRenderViewId());
   });
 })();