chromeos: Add UMA stats for launcher and app list.

chrome/browser/ui/views/ash/chrome_shell_delegate.cc

Index: chrome/browser/ui/views/ash/chrome_shell_delegate.cc
diff --git a/chrome/browser/ui/views/ash/chrome_shell_delegate.cc b/chrome/browser/ui/views/ash/chrome_shell_delegate.cc
index ba5ea3715389411bfc72efc5fa07cd7a0dffd93c..e39c2036c8ed24ea637593668f9654773747ce15 100644
--- a/chrome/browser/ui/views/ash/chrome_shell_delegate.cc
+++ b/chrome/browser/ui/views/ash/chrome_shell_delegate.cc
@@ -353,6 +353,13 @@ void ChromeShellDelegate::RecordUserMetricsAction(
     case ash::UMA_TOUCHSCREEN_TAP_DOWN:
       content::RecordAction(content::UserMetricsAction("Touchscreen_Down"));
       break;
+    case ash::UMA_LAUNCHER_CLICK_ON_APPLIST_BUTTON:
+      content::RecordAction(
+          content::UserMetricsAction("Launcher_ClickOnApplistButton"));
+      break;
+    case ash::UMA_LAUNCHER_CLICK_ON_APP:
+      content::RecordAction(content::UserMetricsAction("Launcher_ClickOnApp"));
+      break;
   }
 }