Mac: Enable help when there are no windows.

chrome/browser/app_controller_mac.mm

 // Copyright (c) 2009 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.
 
 #import "chrome/browser/app_controller_mac.h"
 
 #include "app/l10n_util_mac.h"
 #include "base/command_line.h"
 #include "base/mac_util.h"
 #include "base/message_loop.h"
@@ skipping 484 matching lines @@
       Browser::OpenEmptyWindow(defaultProfile->GetOffTheRecordProfile());
       break;
     case IDC_RESTORE_TAB:
       Browser::OpenWindowWithRestoredTabs(defaultProfile);
       break;
     case IDC_OPEN_FILE:
       Browser::OpenEmptyWindow(defaultProfile);
       BrowserList::GetLastActive()->
           ExecuteCommandWithDisposition(IDC_OPEN_FILE, CURRENT_TAB);
       break;
-    case IDC_CLEAR_BROWSING_DATA:
+    case IDC_CLEAR_BROWSING_DATA: {
       // There may not be a browser open, so use the default profile.
       scoped_nsobject<ClearBrowsingDataController> controller(
           [[ClearBrowsingDataController alloc]
               initWithProfile:defaultProfile]);
       [controller runModalDialog];
       break;
+    }
+    case IDC_HELP_PAGE:
+      Browser::OpenHelpWindow(defaultProfile);
+      break;
   };
 }
 
 // NSApplication delegate method called when someone clicks on the
 // dock icon and there are no open windows.  To match standard mac
 // behavior, we should open a new window.
 - (BOOL)applicationShouldHandleReopen:(NSApplication*)theApplication
                     hasVisibleWindows:(BOOL)flag {
   // Don't do anything if there are visible windows.  This will cause
   // AppKit to unminimize the most recently minimized window.
   if (flag)
     return YES;
 
   // Otherwise open a new window.
   Browser::OpenEmptyWindow([self defaultProfile]);
 
   // We've handled the reopen event, so return NO to tell AppKit not
   // to do anything.
   return NO;
 }
 
 - (void)initMenuState {
   menuState_.reset(new CommandUpdater(NULL));
   menuState_->UpdateCommandEnabled(IDC_NEW_TAB, true);
   menuState_->UpdateCommandEnabled(IDC_NEW_WINDOW, true);
   menuState_->UpdateCommandEnabled(IDC_NEW_INCOGNITO_WINDOW, true);
   menuState_->UpdateCommandEnabled(IDC_OPEN_FILE, true);
   menuState_->UpdateCommandEnabled(IDC_CLEAR_BROWSING_DATA, true);
   menuState_->UpdateCommandEnabled(IDC_RESTORE_TAB, false);
+  menuState_->UpdateCommandEnabled(IDC_HELP_PAGE, true);
   // TODO(pinkerton): ...more to come...
 }
 
 - (Profile*)defaultProfile {
   // TODO(jrg): Find a better way to get the "default" profile.
   if (g_browser_process->profile_manager())
     return* g_browser_process->profile_manager()->begin();
 
   return NULL;
 }
@@ skipping 173 matching lines @@
 @end
 
 //---------------------------------------------------------------------------
 
 // Stub for cross-platform method that isn't called on Mac OS X.
 void ShowOptionsWindow(OptionsPage page,
                        OptionsGroup highlight_group,
                        Profile* profile) {
   NOTIMPLEMENTED();
 }