Revert 186643 - Caused a 10% regression on SunSpider benchmark

chrome/renderer/extensions/web_request_custom_bindings.h

Index: chrome/renderer/extensions/web_request_custom_bindings.h
===================================================================
--- chrome/renderer/extensions/web_request_custom_bindings.h	(revision 186747)
+++ chrome/renderer/extensions/web_request_custom_bindings.h	(working copy)
@@ -12,8 +12,7 @@
 // Implements custom bindings for the webRequest API.
 class WebRequestCustomBindings : public ChromeV8Extension {
  public:
-  WebRequestCustomBindings(Dispatcher* dispatcher,
-                           v8::Handle<v8::Context> v8_context);
+  WebRequestCustomBindings();
 
  private:
   static v8::Handle<v8::Value> GetUniqueSubEventName(const v8::Arguments& args);