ash: Add UMA action metrics for Ctrl-Shift-Q

ash/accelerators/exit_warning_handler.cc

 // Copyright 2013 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 "ash/accelerators/exit_warning_handler.h"
 
 #include "ash/shell.h"
 #include "ash/shell_delegate.h"
 #include "ash/shell_window_ids.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 87 matching lines @@
       widget_(NULL),
       stub_timer_for_test_(false) {
 }
 
 ExitWarningHandler::~ExitWarningHandler() {
   // Note: If a timer is outstanding, it is stopped in its destructor.
   Hide();
 }
 
 void ExitWarningHandler::HandleAccelerator() {
+  ShellDelegate* shell_delegate = Shell::GetInstance()->delegate();
   switch (state_) {
     case IDLE:
       state_ = WAIT_FOR_DOUBLE_PRESS;
       Show();
       StartTimer();
+      shell_delegate->RecordUserMetricsAction(UMA_ACCEL_EXIT_FIRST_Q);
       break;
     case WAIT_FOR_DOUBLE_PRESS:
       state_ = EXITING;
       CancelTimer();
       Hide();
-      Shell::GetInstance()->delegate()->Exit();
+      shell_delegate->RecordUserMetricsAction(UMA_ACCEL_EXIT_SECOND_Q);
+      shell_delegate->Exit();
       break;
     case EXITING:
       break;
     default:
       NOTREACHED();
       break;
   }
 }
 
 void ExitWarningHandler::TimerAction() {
@@ skipping 46 matching lines @@
 }
 
 void ExitWarningHandler::Hide() {
   if (!widget_)
     return;
   widget_->Close();
   widget_ = NULL;
 }
 
 }  // namespace ash