chromeos: Move files in //ash/common to //ash, part 2

ash/shelf/shelf_button_pressed_metric_tracker.cc

 // Copyright 2015 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/common/shelf/shelf_button_pressed_metric_tracker.h"
+#include "ash/shelf/shelf_button_pressed_metric_tracker.h"
 
-#include "ash/common/wm_shell.h"
+#include "ash/wm_shell.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/time/default_tick_clock.h"
 #include "ui/views/controls/button/button.h"
 
 namespace ash {
 
 const char ShelfButtonPressedMetricTracker::
     kTimeBetweenWindowMinimizedAndActivatedActionsHistogramName[] =
         "Ash.Shelf.TimeBetweenWindowMinimizedAndActivatedActions";
 
@@ skipping 73 matching lines @@
   last_minimized_source_button_ = sender;
   time_of_last_minimize_ = tick_clock_->NowTicks();
 }
 
 void ShelfButtonPressedMetricTracker::ResetMinimizedData() {
   last_minimized_source_button_ = nullptr;
   time_of_last_minimize_ = base::TimeTicks();
 }
 
 }  // namespace ash