Consolidate AppControllDelegate to ExtensionsDelegate

athena/content/shell/shell_app_activity.cc

 // Copyright 2014 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 "athena/content/shell/shell_app_activity.h"
 
 #include "extensions/shell/browser/shell_app_window.h"
 
 namespace athena {
 
-ShellAppActivity::ShellAppActivity(extensions::ShellAppWindow* app_window)
-    : shell_app_window_(app_window) {
+ShellAppActivity::ShellAppActivity(extensions::ShellAppWindow* app_window,
+                                   const std::string& app_id)
+    : AppActivity(app_id), shell_app_window_(app_window) {
 }
 
-ShellAppActivity::~ShellAppActivity() {}
+ShellAppActivity::~ShellAppActivity() {
+}
 
 content::WebContents* ShellAppActivity::GetWebContents() {
   return shell_app_window_->GetAssociatedWebContents();
 }
 
 }  // namespace athena