Fix memory leak for extension uninstall dialog.

components/constrained_window/constrained_window_views.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 "components/constrained_window/constrained_window_views.h"
 
 #include <algorithm>
 
 #include "base/macros.h"
 #include "build/build_config.h"
@@ skipping 42 matching lines @@
   }
 
   ~WidgetModalDialogHostObserverViews() override {
     if (host_)
       host_->RemoveObserver(this);
     target_widget_->RemoveObserver(this);
     target_widget_->SetNativeWindowProperty(native_window_property_, NULL);
   }
 
   // WidgetObserver overrides
-  void OnWidgetClosing(views::Widget* widget) override { delete this; }
+  void OnWidgetDestroying(views::Widget* widget) override { delete this; }
 
   // WebContentsModalDialogHostObserver overrides
   void OnPositionRequiresUpdate() override {
     UpdateWidgetModalDialogPosition(target_widget_, host_);
   }
 
   void OnHostDestroying() override {
     host_->RemoveObserver(this);
     host_ = NULL;
   }
@@ skipping 151 matching lines @@
     DCHECK_EQ(parent_view, host->GetHostView());
     ModalDialogHostObserver* dialog_host_observer =
         new WidgetModalDialogHostObserverViews(
             host, widget, kWidgetModalDialogHostObserverViewsKey);
     dialog_host_observer->OnPositionRequiresUpdate();
   }
   return widget;
 }
 
 }  // namespace constrained window