Display dialog when app install succeeds / fails on Athena

athena/extensions/shell/extensions_delegate_impl.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/extensions/public/extensions_delegate.h"
 
 #include "athena/extensions/shell/athena_shell_app_window_client.h"
 #include "base/macros.h"
 #include "extensions/common/extension_set.h"
 #include "extensions/shell/browser/shell_extension_system.h"
@@ skipping 23 matching lines @@
       shell_extensions_.Insert(extension_system_->extension());
     return shell_extensions_;
   }
   virtual bool LaunchApp(const std::string& app_id) override {
     extension_system_->LaunchApp();
     return true;
   }
 
   virtual bool UnloadApp(const std::string& app_id) override { return false; }
 
+  virtual extensions::ExtensionInstallUI* CreateExtensionInstallUI() override {
+    return NULL;
+  }
+
   content::BrowserContext* context_;
   extensions::ShellExtensionSystem* extension_system_;
   extensions::ExtensionSet shell_extensions_;
 
   AthenaShellAppWindowClient app_window_client_;
 
   DISALLOW_COPY_AND_ASSIGN(ShellExtensionsDelegate);
 };
 
 }  // namespace
 
 // static
 void ExtensionsDelegate::CreateExtensionsDelegate(
     content::BrowserContext* context) {
   new ShellExtensionsDelegate(context);
 }
 
 }  // namespace athena