Add help button to app launcher

chrome/browser/ui/app_list/app_list_view_delegate.cc

 // 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/app_list/app_list_view_delegate.h"
 
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/feedback/feedback_util.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/ui/app_list/app_list_controller_delegate.h"
 #include "chrome/browser/ui/app_list/apps_model_builder.h"
 #include "chrome/browser/ui/app_list/chrome_app_list_item.h"
 #include "chrome/browser/ui/app_list/chrome_signin_delegate.h"
 #include "chrome/browser/ui/app_list/search_builder.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/chrome_pages.h"
 #include "chrome/browser/ui/host_desktop.h"
 #include "chrome/common/extensions/extension_constants.h"
+#include "chrome/common/url_constants.h"
+#include "content/public/browser/page_navigator.h"
 #include "content/public/browser/user_metrics.h"
 
 #if defined(USE_ASH)
 #include "chrome/browser/ui/ash/app_list/app_sync_ui_state_watcher.h"
 #endif
 
 AppListViewDelegate::AppListViewDelegate(AppListControllerDelegate* controller,
                                          Profile* profile)
     : controller_(controller),
       profile_(profile) {}
@@ skipping 102 matching lines @@
 
 void AppListViewDelegate::OpenSettings() {
   ExtensionService* service = profile_->GetExtensionService();
   DCHECK(service);
   const extensions::Extension* extension = service->GetInstalledExtension(
       extension_misc::kSettingsAppId);
   DCHECK(extension);
   controller_->ActivateApp(profile_, extension, 0);
 }
 
+void AppListViewDelegate::OpenHelp() {
+  chrome::HostDesktopType desktop = chrome::GetHostDesktopTypeForNativeWindow(
+      controller_->GetAppListWindow());
+  Browser* browser = chrome::FindOrCreateTabbedBrowser(
+      profile_, desktop);
+  browser->OpenURL(content::OpenURLParams(GURL(chrome::kAppLauncherHelpURL),
+                                          content::Referrer(),
+                                          NEW_FOREGROUND_TAB,
+                                          content::PAGE_TRANSITION_LINK,
+                                          false));
+}
+
 void AppListViewDelegate::OpenFeedback() {
   chrome::HostDesktopType desktop = chrome::GetHostDesktopTypeForNativeWindow(
       controller_->GetAppListWindow());
   Browser* browser = chrome::FindOrCreateTabbedBrowser(
       profile_, desktop);
   chrome::ShowFeedbackPage(browser, std::string(),
                            chrome::kAppLauncherCategoryTag);
 }