Add help button to app launcher

chrome/browser/ui/app_list/app_list_view_delegate.cc

Index: chrome/browser/ui/app_list/app_list_view_delegate.cc
diff --git a/chrome/browser/ui/app_list/app_list_view_delegate.cc b/chrome/browser/ui/app_list/app_list_view_delegate.cc
index b2529c43489d5df5be6ee4d2db28d85931b7ed68..83b682fb8fd1721cc40d38f77ec36e9a00931ce4 100644
--- a/chrome/browser/ui/app_list/app_list_view_delegate.cc
+++ b/chrome/browser/ui/app_list/app_list_view_delegate.cc
@@ -17,6 +17,8 @@
 #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)
@@ -138,6 +140,18 @@ void AppListViewDelegate::OpenSettings() {
   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());