Remove useless TabDragController::detach_behavior_ and TabDragController::detach_into_browser_

chrome/browser/ui/tabs/tab_strip_model_delegate.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_TABS_TAB_STRIP_MODEL_DELEGATE_H_
 #define CHROME_BROWSER_UI_TABS_TAB_STRIP_MODEL_DELEGATE_H_
 
 #include <vector>
 
 #include "content/public/common/page_transition_types.h"
@@ skipping 68 matching lines @@
   // Determines what drag actions are possible for the specified strip.
   virtual int GetDragActions() const = 0;
 
   // Returns whether some contents can be duplicated.
   virtual bool CanDuplicateContentsAt(int index) = 0;
 
   // Duplicates the contents at the provided index and places it into its own
   // window.
   virtual void DuplicateContentsAt(int index) = 0;
 
-  // Called when a drag session has completed and the frame that initiated the
-  // the session should be closed.
-  virtual void CloseFrameAfterDragSession() = 0;
-
   // Creates an entry in the historical tab database for the specified
   // WebContents.
   virtual void CreateHistoricalTab(content::WebContents* contents) = 0;
 
   // Runs any unload listeners associated with the specified WebContents
   // before it is closed. If there are unload listeners that need to be run,
   // this function returns true and the TabStripModel will wait before closing
   // the WebContents. If it returns false, there are no unload listeners
   // and the TabStripModel will close the WebContents immediately.
   virtual bool RunUnloadListenerBeforeClosing(
@@ skipping 12 matching lines @@
 
   // Returns true if we should allow "bookmark all tabs" in this window; this is
   // true when there is more than one bookmarkable tab open.
   virtual bool CanBookmarkAllTabs() const = 0;
 
   // Creates a bookmark folder containing a bookmark for all open tabs.
   virtual void BookmarkAllTabs() = 0;
 };
 
 #endif  // CHROME_BROWSER_UI_TABS_TAB_STRIP_MODEL_DELEGATE_H_