Revert 186643 - Caused a 10% regression on SunSpider benchmark

chrome/renderer/extensions/web_request_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/web_request_custom_bindings.h"
 
 #include <string>
 
 #include "base/strings/string_number_conversions.h"
 #include "grit/renderer_resources.h"
 #include "v8/include/v8.h"
 
 namespace extensions {
 
-WebRequestCustomBindings::WebRequestCustomBindings(
-    Dispatcher* dispatcher, v8::Handle<v8::Context> v8_context)
-    : ChromeV8Extension(dispatcher, v8_context) {
+WebRequestCustomBindings::WebRequestCustomBindings()
+    : ChromeV8Extension(NULL) {
   RouteStaticFunction("GetUniqueSubEventName", &GetUniqueSubEventName);
 }
 
 // Attach an event name to an object.
 // static
 v8::Handle<v8::Value> WebRequestCustomBindings::GetUniqueSubEventName(
     const v8::Arguments& args) {
   static int next_event_id = 0;
   DCHECK(args.Length() == 1);
   DCHECK(args[0]->IsString());
   std::string event_name(*v8::String::AsciiValue(args[0]));
   std::string unique_event_name =
       event_name + "/" + base::IntToString(++next_event_id);
   return v8::String::New(unique_event_name.c_str());
 }
 
 }  // extensions