Implement dropping of tabs into an existing tab strip from another window.

chrome/browser/cocoa/tab_strip_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_COCOA_TAB_STRIP_CONTROLLER_H_
 #define CHROME_BROWSER_COCOA_TAB_STRIP_CONTROLLER_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/scoped_nsobject.h"
@@ skipping 51 matching lines @@
         switchView:(NSView*)switchView
              model:(TabStripModel*)model;
 
 // Return the rect, in WebKit coordinates (flipped), of the window's grow box
 // in the coordinate system of the content area of the currently selected tab.
 - (NSRect)selectedTabGrowBoxRect;
 
 // Return the view for the currently selected tab.
 - (NSView *)selectedTabView;
 
-// Drop a tab view at a new index in the array.
-- (void)dropTabView:(NSView *)view atIndex:(NSUInteger)index;
+// Move the given tab at index |from| in this window to the location of the
+// current placeholder.
+- (void)moveTabFromIndex:(NSInteger)from;
+
+// Drop a given TabContents at the location of the current placeholder. If there
+// is no placeholder, it will go at the end. Used when dragging from another
+// window when we don't have access to the TabContents as part of our strip.
+- (void)dropTabContents:(TabContents*)contents;
 
 // Given a tab view in the strip, return its index. Returns -1 if not present.
 - (NSInteger)indexForTabView:(NSView*)view;
 
 // return the view at a given index
 - (NSView*)viewAtIndex:(NSUInteger)index;
 
 // Set the placeholder for a dragged tab, allowing the |frame| and |strechiness|
 // to be specified. This causes this tab to be rendered in an arbitrary position
 - (void)insertPlaceholderForTab:(TabView*)tab
                           frame:(NSRect)frame
                   yStretchiness:(CGFloat)yStretchiness;
 
 // Force the tabs to rearrange themselves to reflect the current model
 - (void)layoutTabs;
 
 // Default height for tabs.
 + (CGFloat)defaultTabHeight;
 @end
 
 #endif  // CHROME_BROWSER_COCOA_TAB_STRIP_CONTROLLER_H_