Deprecate chrome.extension.sendRequest in favor of sendMessage, with a safer

chrome/renderer/resources/extensions/tabs_custom_bindings.js

 // 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.
 
 // Custom bindings for the tabs API.
 
 var tabsNatives = requireNative('tabs');
 var OpenChannelToTab = tabsNatives.OpenChannelToTab;
 
 var chromeHidden = requireNative('chrome_hidden').GetChromeHidden();
 
 chromeHidden.registerCustomHook('tabs', function(bindingsAPI, extensionId) {
   var apiFunctions = bindingsAPI.apiFunctions;
 
   apiFunctions.setHandleRequest('connect', function(tabId, connectInfo) {
     var name = '';
     if (connectInfo) {
       name = connectInfo.name || name;
     }
     var portId = OpenChannelToTab(tabId, extensionId, name);
     return chromeHidden.Port.createPort(portId, name);
   });
 
   apiFunctions.setHandleRequest('sendRequest',
                                 function(tabId, request, responseCallback) {
-    var port = chrome.tabs.connect(tabId,
-                                   {name: chromeHidden.kRequestChannel});
-    port.postMessage(request);
-    port.onDisconnect.addListener(function() {
-      // For onDisconnects, we only notify the callback if there was an error.
-      if (chrome.extension.lastError && responseCallback)
-        responseCallback();
-    });
-    port.onMessage.addListener(function(response) {
-      try {
-        if (responseCallback)
-          responseCallback(response);
-      } finally {
-        port.disconnect();
-        port = null;
-      }
-    });
+    var port = chrome.tabs.connect(tabId, {name: chromeHidden.kRequestChannel});
+    chromeHidden.Port.sendMessageImpl(port, request, responseCallback);
+  });
+
+  apiFunctions.setHandleRequest('sendMessage',
+                                function(tabId, message, responseCallback) {
+    var port = chrome.tabs.connect(tabId, {name: chromeHidden.kMessageChannel});
+    chromeHidden.Port.sendMessageImpl(port, message, responseCallback);
   });
 });