Implement externally_connectable! Web pages can now communicate directly with

chrome/renderer/extensions/dispatcher.cc

 // 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.
 
 #include "chrome/renderer/extensions/dispatcher.h"
 
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/debug/alias.h"
 #include "base/json/json_reader.h"
@@ skipping 977 matching lines @@
 
   // chrome.Event is part of the public API (although undocumented). Make it
   // lazily evalulate to Event from event_bindings.js.
   module_system->SetLazyField(chrome, "Event", kEventModule, "Event");
 
   // Loading JavaScript is expensive, so only run the full API bindings
   // generation mechanisms in extension pages (NOT all web pages).
   switch (context_type) {
     case Feature::UNSPECIFIED_CONTEXT:
     case Feature::WEB_PAGE_CONTEXT:
-      // TODO(kalman): see comment below about ExtensionAPI.
-      InstallBindings(module_system, v8_context, "app");
-      InstallBindings(module_system, v8_context, "webstore");
+      RegisterBinding("app", context);
+      RegisterBinding("runtime", context);  // for connect() and sendMessage()
+      RegisterBinding("webstore", context);
       break;
     case Feature::BLESSED_EXTENSION_CONTEXT:
     case Feature::UNBLESSED_EXTENSION_CONTEXT:
     case Feature::CONTENT_SCRIPT_CONTEXT:
       // TODO(kalman): move this code back out of the switch and execute it
       // regardless of |context_type|. ExtensionAPI knows how to return the
       // correct APIs, however, until it doesn't have a 2MB overhead we can't
       // load it in every process.
       AddOrRemoveBindings(context);
       break;
@@ skipping 422 matching lines @@
     RenderView* background_view =
         ExtensionHelper::GetBackgroundPage(extension_id);
     if (background_view) {
       background_view->Send(new ExtensionHostMsg_EventAck(
           background_view->GetRoutingID()));
     }
   }
 }
 
 }  // namespace extensions