mash: Move SystemTrayDelegate and dependencies to //ash/common

ash/wm/overview/window_selector_controller.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/wm/overview/window_selector_controller.h"
 
 #include <vector>
 
 #include "ash/common/session/session_state_delegate.h"
+#include "ash/common/system/tray/system_tray_delegate.h"
 #include "ash/common/wm/mru_window_tracker.h"
 #include "ash/common/wm/window_state.h"
 #include "ash/common/wm_shell.h"
 #include "ash/common/wm_window.h"
 #include "ash/shell.h"
-#include "ash/system/tray/system_tray_delegate.h"
 #include "ash/wm/overview/window_selector.h"
 #include "base/metrics/histogram.h"
 
 namespace ash {
 
 WindowSelectorController::WindowSelectorController() {
 }
 
 WindowSelectorController::~WindowSelectorController() {
 }
@@ skipping 57 matching lines @@
 
 void WindowSelectorController::OnSelectionStarted() {
   if (!last_selection_time_.is_null()) {
     UMA_HISTOGRAM_LONG_TIMES(
         "Ash.WindowSelector.TimeBetweenUse",
         base::Time::Now() - last_selection_time_);
   }
 }
 
 }  // namespace ash