Remove useless TabDragController::detach_behavior_ and TabDragController::detach_into_browser_

chrome/browser/ui/browser_tab_strip_model_delegate.cc

 // 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.
 
 #include "chrome/browser/ui/browser_tab_strip_model_delegate.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 84 matching lines @@
 }
 
 bool BrowserTabStripModelDelegate::CanDuplicateContentsAt(int index) {
   return CanDuplicateTabAt(browser_, index);
 }
 
 void BrowserTabStripModelDelegate::DuplicateContentsAt(int index) {
   DuplicateTabAt(browser_, index);
 }
 
-void BrowserTabStripModelDelegate::CloseFrameAfterDragSession() {
-#if !defined(OS_MACOSX)
-  // This is scheduled to run after we return to the message loop because
-  // otherwise the frame will think the drag session is still active and ignore
-  // the request.
-  base::MessageLoop::current()->PostTask(
-      FROM_HERE,
-      base::Bind(&BrowserTabStripModelDelegate::CloseFrame,
-                 weak_factory_.GetWeakPtr()));
-#endif
-}
-
 void BrowserTabStripModelDelegate::CreateHistoricalTab(
     content::WebContents* contents) {
   // We don't create historical tabs for incognito windows or windows without
   // profiles.
   if (!browser_->profile() || browser_->profile()->IsOffTheRecord())
     return;
 
   TabRestoreService* service =
       TabRestoreServiceFactory::GetForProfile(browser_->profile());
 
@@ skipping 41 matching lines @@
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // BrowserTabStripModelDelegate, private:
 
 void BrowserTabStripModelDelegate::CloseFrame() {
   browser_->window()->Close();
 }
 
 }  // namespace chrome