Refactors WindowResizers to use ash/wm/common

ash/wm/panels/attached_panel_window_targeter.cc

 // Copyright 2014 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/panels/attached_panel_window_targeter.h"
 
 #include "ash/shelf/shelf.h"
 #include "ash/shell.h"
+#include "ash/wm/aura/wm_shelf_aura.h"
 #include "ash/wm/panels/panel_layout_manager.h"
 
 namespace ash {
 
 AttachedPanelWindowTargeter::AttachedPanelWindowTargeter(
     aura::Window* container,
     const gfx::Insets& default_mouse_extend,
     const gfx::Insets& default_touch_extend,
     PanelLayoutManager* panel_layout_manager)
     : ::wm::EasyResizeWindowTargeter(container,
@@ skipping 24 matching lines @@
 }
 
 void AttachedPanelWindowTargeter::UpdateTouchExtend(aura::Window* root_window) {
   // Only update the touch insets for panels if they are attached to the shelf
   // in |root_window|.
   if (panel_container_->GetRootWindow() != root_window)
     return;
 
   DCHECK(panel_layout_manager_->shelf());
   gfx::Insets touch(default_touch_extend_);
-  set_touch_extend(panel_layout_manager_->shelf()->SelectValueForShelfAlignment(
-      gfx::Insets(touch.top(), touch.left(), 0, touch.right()),
-      gfx::Insets(touch.top(), 0, touch.bottom(), touch.right()),
-      gfx::Insets(touch.top(), touch.left(), touch.bottom(), 0)));
+  set_touch_extend(
+      wm::WmShelfAura::GetShelf(panel_layout_manager_->shelf())
+          ->SelectValueForShelfAlignment(
+              gfx::Insets(touch.top(), touch.left(), 0, touch.right()),
+              gfx::Insets(touch.top(), 0, touch.bottom(), touch.right()),
+              gfx::Insets(touch.top(), touch.left(), touch.bottom(), 0)));
 }
 
 }  // namespace ash