Swap main menu with app-specific menu when app window focused.

chrome/browser/ui/cocoa/extensions/native_app_window_cocoa.mm

 // Copyright (c) 2012 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/browser/ui/cocoa/extensions/native_app_window_cocoa.h"
 
 #include "base/mac/mac_util.h"
 #include "base/strings/sys_string_conversions.h"
+#include "chrome/browser/app_controller_mac.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/cocoa/browser_window_utils.h"
 #import "chrome/browser/ui/cocoa/chrome_event_processing_window.h"
 #include "chrome/browser/ui/cocoa/extensions/extension_keybinding_registry_cocoa.h"
 #include "chrome/browser/ui/cocoa/extensions/extension_view_mac.h"
 #include "chrome/common/extensions/extension.h"
 #include "content/public/browser/native_web_keyboard_event.h"
 #include "content/public/browser/notification_source.h"
 #include "content/public/browser/notification_types.h"
 #include "content/public/browser/render_widget_host_view.h"
@@ skipping 714 matching lines @@
     web_modal::WebContentsModalDialogHostObserver* observer) {
   NOTIMPLEMENTED();
 }
 
 void NativeAppWindowCocoa::WindowWillClose() {
   [window_controller_ setAppWindow:NULL];
   shell_window_->OnNativeWindowChanged();
   shell_window_->OnNativeClose();
 }
 
 void NativeAppWindowCocoa::WindowDidBecomeKey() {

[tapted, 2013/06/28 04:09:43]

does this happen for panel windows as well?

[jackhou1, 2013/07/04 01:57:55]

Yeah it does. Changed to using notifications so we don't need to call this for
every window implementation.

   content::RenderWidgetHostView* rwhv =
       web_contents()->GetRenderWidgetHostView();
   if (rwhv)
     rwhv->SetActive(true);
+  const extensions::Extension* app = shell_window_->extension();
+  [[NSApp delegate] setMenuBarToApp:base::SysUTF8ToNSString(app->id())
+                          withTitle:base::SysUTF8ToNSString(app->name())];
   shell_window_->OnNativeWindowActivated();
 }
 
 void NativeAppWindowCocoa::WindowDidResignKey() {
   // If our app is still active and we're still the key window, ignore this
   // message, since it just means that a menu extra (on the "system status bar")
   // was activated; we'll get another |-windowDidResignKey| if we ever really
   // lose key window status.
   if ([NSApp isActive] && ([NSApp keyWindow] == window()))
     return;
@@ skipping 63 matching lines @@
   CHECK(!window || [window isKindOfClass:[ShellNSWindow class]]);
   return static_cast<ShellNSWindow*>(window);
 }
 
 // static
 NativeAppWindow* NativeAppWindow::Create(
     ShellWindow* shell_window,
     const ShellWindow::CreateParams& params) {
   return new NativeAppWindowCocoa(shell_window, params);
 }