Removes |old| parameter from OnWindowPropertyChanged()

ash/wm/common/panels/panel_layout_manager.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 "ash/wm/common/panels/panel_layout_manager.h"
 
 #include <algorithm>
 #include <map>
 #include <utility>
 
@@ skipping 429 matching lines @@
   Relayout();
 }
 
 void PanelLayoutManager::OnShelfAlignmentChanged() {
   Relayout();
 }
 
 /////////////////////////////////////////////////////////////////////////////
 // PanelLayoutManager, WindowObserver implementation:
 
-void PanelLayoutManager::OnWindowPropertyChanged(wm::WmWindow* window,
-                                                 wm::WmWindowProperty property,
-                                                 intptr_t old) {
+void PanelLayoutManager::OnWindowPropertyChanged(
+    wm::WmWindow* window,
+    wm::WmWindowProperty property) {
   // Trigger a relayout to position the panels whenever the panel icon is set
   // or changes.
   if (property == wm::WmWindowProperty::SHELF_ID)
     Relayout();
 }
 
 /////////////////////////////////////////////////////////////////////////////
 // PanelLayoutManager, WindowStateObserver implementation:
 
 void PanelLayoutManager::OnPostWindowStateTypeChange(
@@ skipping 430 matching lines @@
       // Keyboard hidden, restore original bounds if they exist.
       panel->SetBoundsDirect(panel_state->GetRestoreBoundsInScreen());
     }
   }
   // This bounds change will have caused a change to the Shelf which does not
   // propogate automatically to this class, so manually recalculate bounds.
   OnWindowResized();
 }
 
 }  // namespace ash