Refactors WindowResizers to use ash/wm/common

ash/wm/common/wm_user_metrics_action.h

Index: ash/wm/common/wm_user_metrics_action.h
diff --git a/ash/wm/common/shelf/wm_shelf_constants.cc b/ash/wm/common/wm_user_metrics_action.h
similarity index 51%
copy from ash/wm/common/shelf/wm_shelf_constants.cc
copy to ash/wm/common/wm_user_metrics_action.h
index fa0425c97a671ec2b850a611e87ee3aa395e90e6..b192ff601b11fa3e9949f59e6300d9c70674ced1 100644
--- a/ash/wm/common/shelf/wm_shelf_constants.cc
+++ b/ash/wm/common/wm_user_metrics_action.h
@@ -2,13 +2,18 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "ash/wm/common/shelf/wm_shelf_constants.h"
+#ifndef ASH_WM_COMMON_WM_USER_METRICS_ACTION_H_
+#define ASH_WM_COMMON_WM_USER_METRICS_ACTION_H_
 
 namespace ash {
 namespace wm {
 
-const int kShelfBackgroundAlpha = 204;
-const int kTimeToSwitchBackgroundMs = 1000;
+enum class WmUserMetricsAction {
+  DRAG_MAXIMIZE_LEFT,
+  DRAG_MAXIMIZE_RIGHT,
+};
 
 }  // namespace wm
 }  // namespace ash
+
+#endif  // ASH_WM_COMMON_WM_USER_METRICS_ACTION_H_