[Mac] Inform reference counted objects that hold a weak Browser* when the Browser is being destroye…

chrome/browser/ui/cocoa/toolbar/toolbar_controller_unittest.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 <Cocoa/Cocoa.h>
 
 #import "base/mac/scoped_nsobject.h"
 #include "base/prefs/pref_service.h"
 #include "base/run_loop.h"
 #include "chrome/app/chrome_command_ids.h"
@@ skipping 280 matching lines @@
  private:
   base::RunLoop run_loop_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserRemovedObserver);
 };
 
 // Test that ToolbarController can be destroyed after the Browser.
 // This can happen because the ToolbarController is retained by both the
 // BrowserWindowController and -[ToolbarController view], the latter of which is
 // autoreleased.
-// TODO(nhiroki): This is disabled due to http://crbug.com/506745.
-TEST_F(ToolbarControllerTest, DISABLED_ToolbarDestroyedAfterBrowser) {
+TEST_F(ToolbarControllerTest, ToolbarDestroyedAfterBrowser) {
   BrowserRemovedObserver observer;
+  // This is normally called by BrowserWindowController, but since |bar_| is not
+  // owned by one, call it here.
+  [bar_ browserWillBeDestroyed];
   CloseBrowserWindow();
   observer.WaitUntilBrowserRemoved();
   // |bar_| is released in TearDown().
 }
 
 }  // namespace