Add Hide to app menu.

apps/app_shim/chrome_main_app_mode_mac.mm

 // Copyright 2013 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.
 
 // On Mac, one can't make shortcuts with command-line arguments. Instead, we
 // produce small app bundles which locate the Chromium framework and load it,
 // passing the appropriate data. This is the entry point into the framework for
 // those app bundles.
 
 #import <Cocoa/Cocoa.h>
@@ skipping 81 matching lines @@
 
  private:
   // IPC::Listener implemetation.
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
   virtual void OnChannelError() OVERRIDE;
 
   // If Chrome failed to launch the app, |success| will be false and the app
   // shim process should die.
   void OnLaunchAppDone(apps::AppShimLaunchResult result);
 
+  // Hide this app.
+  void OnHide();
+
   // Requests user attention.
   void OnRequestUserAttention();
 
   // Terminates the app shim process.
   void Close();
 
   IPC::ChannelProxy* channel_;
   base::scoped_nsobject<AppShimDelegate> nsapp_delegate_;
   bool launch_app_done_;
 
@@ skipping 72 matching lines @@
 }
 
 void AppShimController::SendQuitApp() {
   channel_->Send(new AppShimHostMsg_QuitApp);
 }
 
 bool AppShimController::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(AppShimController, message)
     IPC_MESSAGE_HANDLER(AppShimMsg_LaunchApp_Done, OnLaunchAppDone)
+    IPC_MESSAGE_HANDLER(AppShimMsg_Hide, OnHide)
     IPC_MESSAGE_HANDLER(AppShimMsg_RequestUserAttention, OnRequestUserAttention)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
 
   return handled;
 }
 
 void AppShimController::OnChannelError() {
   Close();
 }
 
 void AppShimController::OnLaunchAppDone(apps::AppShimLaunchResult result) {
   if (result != apps::APP_SHIM_LAUNCH_SUCCESS) {
     Close();
     return;
   }
 
   launch_app_done_ = true;
 }
 
+void AppShimController::OnHide() {
+  [NSApp hide:nil];
+}
+
 void AppShimController::OnRequestUserAttention() {
   [NSApp requestUserAttention:NSInformationalRequest];
 }
 
 void AppShimController::Close() {
   [nsapp_delegate_ terminateNow];
 }
 
 void AppShimController::ActivateApp(bool is_reopen) {
   if (launch_app_done_) {
@@ skipping 273 matching lines @@
   // fully initialized don't receive a reply until its run loop starts. Once
   // the reply is received, Chrome will have opened its IPC port, guaranteed.
   [ReplyEventHandler pingProcess:psn andCall:base::Bind(&OnPingChromeReply)];
 
   base::MessageLoopForUI main_message_loop;
   main_message_loop.set_thread_name("MainThread");
   base::PlatformThread::SetName("CrAppShimMain");
   main_message_loop.Run();
   return 0;
 }