Use a single ToplevelWindowEventHandler for the ash::Shell

ash/metrics/user_metrics_recorder.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/metrics/user_metrics_recorder.h"
 
 #include "ash/shelf/shelf_layout_manager.h"
 #include "ash/shelf/shelf_view.h"
 #include "ash/shelf/shelf_widget.h"
 #include "ash/shell.h"
@@ skipping 61 matching lines @@
     case ash::UMA_LAUNCHER_CLICK_ON_APP:
       content::RecordAction(content::UserMetricsAction("Launcher_ClickOnApp"));
       break;
     case ash::UMA_LAUNCHER_CLICK_ON_APPLIST_BUTTON:
       content::RecordAction(
           content::UserMetricsAction("Launcher_ClickOnApplistButton"));
       break;
     case ash::UMA_MOUSE_DOWN:
       content::RecordAction(content::UserMetricsAction("Mouse_Down"));
       break;
+    case ash::UMA_PANEL_MINIMIZE_CAPTION_CLICK:
+      content::RecordAction(
+          content::UserMetricsAction("Panel_Minimize_Caption_Click"));
+      break;
+    case ash::UMA_PANEL_MINIMIZE_CAPTION_GESTURE:
+      content::RecordAction(
+          content::UserMetricsAction("Panel_Minimize_Caption_Gesture"));
+      break;
     case ash::UMA_SHELF_ALIGNMENT_SET_BOTTOM:
       content::RecordAction(
           content::UserMetricsAction("Shelf_AlignmentSetBottom"));
       break;
     case ash::UMA_SHELF_ALIGNMENT_SET_LEFT:
       content::RecordAction(
           content::UserMetricsAction("Shelf_AlignmentSetLeft"));
       break;
     case ash::UMA_SHELF_ALIGNMENT_SET_RIGHT:
       content::RecordAction(
@@ skipping 314 matching lines @@
         active_window_show_type = ACTIVE_WINDOW_SHOW_TYPE_OTHER;
         break;
     }
   }
   UMA_HISTOGRAM_ENUMERATION("Ash.ActiveWindowShowTypeOverTime",
                             active_window_show_type,
                             ACTIVE_WINDOW_SHOW_TYPE_COUNT);
 }
 
 }  // namespace ash