Mac: Clean up outdated use of NSThemeFrame

chrome/browser/ui/cocoa/browser_window_controller_private.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/browser_window_controller_private.h"
 
 #include <cmath>
 
 #include "base/command_line.h"
 #include "base/mac/bind_objc_block.h"
@@ skipping 359 matching lines @@
     NSView* avatarButtonView = [avatarButtonController_ view];
 
     [avatarButtonView removeFromSuperview];
     [avatarButtonView setHidden:YES];  // Will be shown in layout.
     [[destWindow contentView] addSubview:avatarButtonView];
   }
 
   // Add the tab strip after setting the content view and moving the incognito
   // badge (if any), so that the tab strip will be on top (in the z-order).
   if ([self hasTabStrip])
-    [self insertTabStripView:tabStripView intoWindow:destWindow];
+    [[destWindow contentView] addSubview:tabStripView];
 
   [sourceWindow setWindowController:nil];
   [self setWindow:destWindow];
   [destWindow setWindowController:self];
 
   // Move the status bubble over, if we have one.
   if (statusBubble_)
     statusBubble_->SwitchParentWindow(destWindow);
 
   // Move the title over.
@@ skipping 675 matching lines @@
 }
 
 - (BOOL)shouldConstrainFrameRect {
   if ([enterFullscreenTransition_ shouldWindowBeUnconstrained])
     return NO;
 
   return [super shouldConstrainFrameRect];
 }
 
 @end  // @implementation BrowserWindowController(Private)