Move chromeos code to namespace chromeos.

chrome/browser/chromeos/panel_controller.h

 // Copyright (c) 2009 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_CHROMEOS_PANEL_CONTROLLER_H_
 #define CHROME_BROWSER_CHROMEOS_PANEL_CONTROLLER_H_
 
 #include <gtk/gtk.h>
 
 #include "views/controls/button/button.h"
 
 #if defined(TOOLKIT_VIEWS)
 class BrowserView;
 #else
 class BrowserWindowGtk;
 #endif
 typedef unsigned long XID;
 
 namespace views {
 class ImageButton;
 class ImageView;
 class Label;
 class MouseEvent;
 class WidgetGtk;
 }
 
+namespace chromeos {
+
 // Controls interactions with the WM for popups / panels.
 class PanelController : public views::ButtonListener {
  public:
 #if defined(TOOLKIT_VIEWS)
   explicit PanelController(BrowserView* browser_window);
 #else
   explicit PanelController(BrowserWindowGtk* browser_window);
 #endif
   virtual ~PanelController() {}
 
@@ skipping 79 matching lines @@
   int mouse_down_offset_x_;
   int mouse_down_offset_y_;
 
   // Is the titlebar currently being dragged?  That is, has the cursor
   // moved more than kDragThreshold away from its starting position?
   bool dragging_;
 
   DISALLOW_COPY_AND_ASSIGN(PanelController);
 };
 
+}  // namespace chromeos
+
 #endif  // CHROME_BROWSER_CHROMEOS_PANEL_CONTROLLER_H_