Make panels turn on or off shadow effect.

chrome/browser/ui/panels/panel.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_PANELS_PANEL_H_
 #define CHROME_BROWSER_UI_PANELS_PANEL_H_
 
 #include <string>
 
 #include "base/gtest_prod_util.h"
@@ skipping 287 matching lines @@
   void MoveByInstantly(const gfx::Vector2d& delta_origin);
 
   // Applies |corner_style| to the panel window.
   void SetWindowCornerStyle(panel::CornerStyle corner_style);
 
   // Performs the system minimize for the panel, i.e. becoming iconic.
   void MinimizeBySystem();
 
   bool IsMinimizedBySystem() const;
 
+  // Turns on/off the shadow effect around the window shape.
+  void ShowShadow(bool show);
+
  protected:
   // Panel can only be created using PanelManager::CreatePanel() or subclass.
   // |app_name| is the default title for Panels when the page content does not
   // provide a title. For extensions, this is usually the application name
   // generated from the extension id.
   Panel(const std::string& app_name,
         const gfx::Size& min_size, const gfx::Size& max_size);
 
  private:
   friend class PanelManager;
@@ skipping 73 matching lines @@
 
   // Icon showed in the task bar.
   gfx::Image app_icon_;
 
   base::WeakPtrFactory<Panel> image_loader_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(Panel);
 };
 
 #endif  // CHROME_BROWSER_UI_PANELS_PANEL_H_