Add UMA metrics for window selection and overview.

chrome/browser/ui/ash/chrome_shell_delegate.cc

Index: chrome/browser/ui/ash/chrome_shell_delegate.cc
diff --git a/chrome/browser/ui/ash/chrome_shell_delegate.cc b/chrome/browser/ui/ash/chrome_shell_delegate.cc
index 116aee885bbbca2081516d220ac8b961d7563999..d778bb2726aa9ec9eaf767e2cf6b181ab4e1ccfe 100644
--- a/chrome/browser/ui/ash/chrome_shell_delegate.cc
+++ b/chrome/browser/ui/ash/chrome_shell_delegate.cc
@@ -417,6 +417,14 @@ void ChromeShellDelegate::RecordUserMetricsAction(
     case ash::UMA_WINDOW_MAXIMIZE_BUTTON_SHOW_BUBBLE:
       content::RecordAction(content::UserMetricsAction("MaxButton_ShowBubble"));
       break;
+    case ash::UMA_WINDOW_OVERVIEW:
+      content::RecordAction(
+          content::UserMetricsAction("WindowSelector_Overview"));
+      break;
+    case ash::UMA_WINDOW_SELECTION:
+      content::RecordAction(
+          content::UserMetricsAction("WindowSelector_Selection"));
+      break;
   }
 }