Change panel drag related methods to use mouse location in screen coordinates.

chrome/browser/ui/panels/panel_manager.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_MANAGER_H_
 #define CHROME_BROWSER_UI_PANELS_PANEL_MANAGER_H_
 #pragma once
 
 #include <vector>
 #include "base/basictypes.h"
@@ skipping 28 matching lines @@
   // later.
   Panel* CreatePanel(Browser* browser);
 
   // Close all panels (asynchronous). Panels will be removed after closing.
   void CloseAll();
 
   // Asynchronous confirmation of panel having been closed.
   void OnPanelClosed(Panel* panel);
 
   // Drags the given panel.
-  void StartDragging(Panel* panel);
-  void Drag(int delta_x, int delta_y);
+  // |mouse_location| is in screen coordinate system.
+  void StartDragging(Panel* panel, const gfx::Point& mouse_location);
+  void Drag(const gfx::Point& mouse_location);
   void EndDragging(bool cancelled);
 
   // Invoked when a panel's expansion state changes.
   void OnPanelExpansionStateChanged(Panel* panel);
 
   // Invoked when the preferred window size of the given panel might need to
   // get changed.
   void OnWindowAutoResized(Panel* panel,
                            const gfx::Size& preferred_window_size);
 
@@ skipping 153 matching lines @@
   bool is_full_screen_;
 
   // True only while moving panels to overflow. Used to prevent moving panels
   // out of overflow while in the process of moving panels to overflow.
   bool is_processing_overflow_;
 
   DISALLOW_COPY_AND_ASSIGN(PanelManager);
 };
 
 #endif  // CHROME_BROWSER_UI_PANELS_PANEL_MANAGER_H_