Fix some issues with extension messaging:

chrome/renderer/extensions/event_bindings.cc

 // Copyright (c) 2009 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/event_bindings.h"
 
 #include "base/basictypes.h"
 #include "base/singleton.h"
 #include "chrome/common/render_messages.h"
 #include "chrome/common/url_constants.h"
@@ skipping 126 matching lines @@
 
   GURL url = frame->GetView()->GetMainFrame()->GetURL();
   std::string extension_id;
   if (url.SchemeIs(chrome::kExtensionScheme))
     extension_id = url.host();
 
   v8::Persistent<v8::Context> persistent_context =
       v8::Persistent<v8::Context>::New(context);
   GetContexts().push_back(linked_ptr<ContextInfo>(
       new ContextInfo(persistent_context, extension_id)));
+
+  v8::Handle<v8::Value> argv[1];
+  argv[0] = v8::String::New(extension_id.c_str());
+  CallFunctionInContext(context, "dispatchOnLoad", arraysize(argv), argv);
 }
 
 // static
 void EventBindings::HandleContextDestroyed(WebFrame* frame) {
   if (!bindings_registered)
     return;
 
   v8::HandleScope handle_scope;
   v8::Local<v8::Context> context = frame->GetScriptContext();
   DCHECK(!context.IsEmpty());
@@ skipping 18 matching lines @@
 
   // Remove it from our registered contexts.
   (*it)->context.Dispose();
   (*it)->context.Clear();
   GetContexts().erase(it);
 }
 
 // static
 void EventBindings::CallFunction(const std::string& function_name,
                                  int argc, v8::Handle<v8::Value>* argv) {
-  v8::HandleScope handle_scope;
   for (ContextList::iterator it = GetContexts().begin();
        it != GetContexts().end(); ++it) {
     CallFunctionInContext((*it)->context, function_name, argc, argv);
   }
 }
 
 // static
 void EventBindings::HandleResponse(int request_id, bool success,
                                    const std::string& response,
                                    const std::string& error) {
   PendingRequest* request = GetPendingRequestMap()[request_id].get();
   if (!request)
     return;  // The frame went away.
 
   v8::HandleScope handle_scope;
   v8::Handle<v8::Value> argv[5];
   argv[0] = v8::Integer::New(request_id);
   argv[1] = v8::String::New(request->name.c_str());
   argv[2] = v8::Boolean::New(success);
   argv[3] = v8::String::New(response.c_str());
   argv[4] = v8::String::New(error.c_str());
   CallFunctionInContext(
       request->context, "handleResponse", arraysize(argv), argv);
 
   GetPendingRequestMap().erase(request_id);
 }