Revert 184837

chrome/renderer/extensions/tabs_custom_bindings.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/tabs_custom_bindings.h"
 
 #include <string>
 
 #include "chrome/common/extensions/extension_messages.h"
 #include "content/public/renderer/render_view.h"
 #include "grit/renderer_resources.h"
 #include "v8/include/v8.h"
 
 namespace extensions {
 
-TabsCustomBindings::TabsCustomBindings(Dispatcher* dispatcher,
-                                       v8::Handle<v8::Context> context)
-    : ChromeV8Extension(dispatcher, context) {
+TabsCustomBindings::TabsCustomBindings()
+    : ChromeV8Extension(NULL) {
   RouteStaticFunction("OpenChannelToTab", &OpenChannelToTab);
 }
 
 // static
 v8::Handle<v8::Value> TabsCustomBindings::OpenChannelToTab(
     const v8::Arguments& args) {
   // Get the current RenderView so that we can send a routed IPC message from
   // the correct source.
-  TabsCustomBindings* self = GetFromArguments<TabsCustomBindings>(args);
-  content::RenderView* renderview = self->GetRenderView();
+  content::RenderView* renderview = GetCurrentRenderView();
   if (!renderview)
     return v8::Undefined();
 
   if (args.Length() >= 3 && args[0]->IsInt32() && args[1]->IsString() &&
       args[2]->IsString()) {
     int tab_id = args[0]->Int32Value();
     std::string extension_id = *v8::String::Utf8Value(args[1]->ToString());
     std::string channel_name = *v8::String::Utf8Value(args[2]->ToString());
     int port_id = -1;
     renderview->Send(new ExtensionHostMsg_OpenChannelToTab(
       renderview->GetRoutingID(), tab_id, extension_id, channel_name,
         &port_id));
     return v8::Integer::New(port_id);
   }
   return v8::Undefined();
 }
 
 }  // extensions