Added the Ash.Tab.TimeBetweenSwitchToExistingTabUserActions histogram to track time between tab swit

chrome/browser/ui/ash/chrome_shell_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/ash/chrome_shell_delegate.h"
 
 #include "ash/content_support/gpu_support_impl.h"
 #include "ash/wm/window_state.h"
 #include "ash/wm/window_util.h"
 #include "chrome/browser/app_mode/app_mode_utils.h"
 #include "chrome/browser/lifetime/application_lifetime.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/profiles/profiles_state.h"
 #include "chrome/browser/ui/app_list/app_list_view_delegate.h"
 #include "chrome/browser/ui/ash/app_list/app_list_service_ash.h"
 #include "chrome/browser/ui/ash/ash_keyboard_controller_proxy.h"
 #include "chrome/browser/ui/ash/launcher/chrome_launcher_controller.h"
 #include "chrome/browser/ui/ash/launcher/launcher_context_menu.h"
+#include "chrome/browser/ui/ash/metrics/user_metrics_recorder_proxy_impl.h"
 #include "chrome/browser/ui/browser_commands.h"
 #include "chrome/grit/chromium_strings.h"
 #include "components/signin/core/common/profile_management_switches.h"
 #include "ui/base/l10n/l10n_util.h"
 
 #if defined(OS_CHROMEOS)
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/chromeos/accessibility/accessibility_manager.h"
 #include "chrome/browser/chromeos/display/display_configuration_observer.h"
 #include "chrome/browser/chromeos/profiles/profile_helper.h"
@@ skipping 117 matching lines @@
     return new LauncherContextMenu(shelf_delegate_, item_delegate, item, root);
 
   return new LauncherContextMenu(shelf_delegate_, root);
 }
 
 ash::GPUSupport* ChromeShellDelegate::CreateGPUSupport() {
   // Chrome uses real GPU support.
   return new ash::GPUSupportImpl;
 }
 
+ash::UserMetricsRecorderProxy*
+ChromeShellDelegate::CreateUserMetricsRecorderProxy() {
+  return new UserMetricsRecorderProxyImpl;
+}
+
 base::string16 ChromeShellDelegate::GetProductName() const {
   return l10n_util::GetStringUTF16(IDS_PRODUCT_NAME);
 }
 
 keyboard::KeyboardControllerProxy*
     ChromeShellDelegate::CreateKeyboardControllerProxy() {
   return new AshKeyboardControllerProxy(
       ProfileManager::GetActiveUserProfile());
 }
 
 void ChromeShellDelegate::VirtualKeyboardActivated(bool activated) {
   FOR_EACH_OBSERVER(ash::VirtualKeyboardStateObserver,
                     keyboard_state_observer_list_,
                     OnVirtualKeyboardStateChanged(activated));
 }
 
 void ChromeShellDelegate::AddVirtualKeyboardStateObserver(
     ash::VirtualKeyboardStateObserver* observer) {
   keyboard_state_observer_list_.AddObserver(observer);
 }
 
 void ChromeShellDelegate::RemoveVirtualKeyboardStateObserver(
     ash::VirtualKeyboardStateObserver* observer) {
   keyboard_state_observer_list_.RemoveObserver(observer);
 }