Move extension messages to their own file and add a RenderViewObserver to start moving the extens...

chrome/renderer/extensions/extension_helper.cc

+// Copyright (c) 2011 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/extension_helper.h"
+
+#include "chrome/common/extensions/extension_messages.h"
+#include "chrome/renderer/extensions/extension_process_bindings.h"
+#include "chrome/renderer/extensions/renderer_extension_bindings.h"
+
+ExtensionHelper::ExtensionHelper(RenderView* render_view)
+    : RenderViewObserver(render_view) {
+}
+
+ExtensionHelper::~ExtensionHelper() {
+}
+
+bool ExtensionHelper::OnMessageReceived(const IPC::Message& message) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(ExtensionHelper, message)
+    IPC_MESSAGE_HANDLER(ExtensionMsg_Response, OnExtensionResponse)
+    IPC_MESSAGE_HANDLER(ExtensionMsg_MessageInvoke, OnExtensionMessageInvoke)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+  return handled;
+}
+
+void ExtensionHelper::OnExtensionResponse(int request_id,
+                                          bool success,
+                                          const std::string& response,
+                                          const std::string& error) {
+  ExtensionProcessBindings::HandleResponse(
+      request_id, success, response, error);
+}
+
+void ExtensionHelper::OnExtensionMessageInvoke(const std::string& extension_id,
+                                               const std::string& function_name,
+                                               const ListValue& args,
+                                               const GURL& event_url) {
+  RendererExtensionBindings::Invoke(
+      extension_id, function_name, args, render_view(), event_url);
+}