Support detaching/attaching panels via inter-strip drags.

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 46 matching lines @@
   // 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);
 
   // Resizes the panel. Explicitly setting the panel size is not allowed
   // for panels that are auto-sized.
   void ResizePanel(Panel* panel, const gfx::Size& new_size);
 
   // Moves the |panel| to a different type of panel strip.
-  void MovePanelToStrip(Panel* panel, PanelStrip::Type new_layout);
+  void MovePanelToStrip(Panel* panel,
+                        PanelStrip::Type new_layout,
+                        PanelStrip::PositioningMask positioning_mask);
 
   // Move all panels up to, and including, the |last_panel_to_move| to overflow.
   void MovePanelsToOverflow(Panel* last_panel_to_move);
 
   // Moves as many panels out of overflow as space allows.
   void MovePanelsOutOfOverflowIfCanFit();
 
   // Returns true if we should bring up the titlebars, given the current mouse
   // point.
   bool ShouldBringUpTitlebars(int mouse_x, int mouse_y) const;
@@ skipping 137 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_