Remove TabContents from constrained windows.

chrome/browser/ui/cocoa/tabs/tab_strip_controller.mm

 // 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.
 
 #import "chrome/browser/ui/cocoa/tabs/tab_strip_controller.h"
 
 #import <QuartzCore/QuartzCore.h>
 
 #include <cmath>
 #include <limits>
@@ skipping 2090 matching lines @@
 
   // ...and raise a tab with a sheet.
   NSInteger index = [self modelIndexForContentsView:view];
   DCHECK(index >= 0);
   if (index >= 0)
     tabStripModel_->ActivateTabAt(index, false /* not a user gesture */);
 }
 
 @end
 
-NSView* GetSheetParentViewForTabContents(TabContents* tab_contents) {
+NSView* GetSheetParentViewForWebContents(WebContents* web_contents) {
   // View hierarchy of the contents view:
   // NSView  -- switchView, same for all tabs
   // +- NSView  -- TabContentsController's view
   //    +- TabContentsViewCocoa
   //
   // Changing it? Do not forget to modify
   // -[TabStripController swapInTabAtIndex:] too.
-  return [tab_contents->web_contents()->GetNativeView() superview];
+  return [web_contents->GetNativeView() superview];
 }