Fix crash/leak issue in native_view_host_gtk.cc.

views/controls/native/native_view_host_gtk.h

 // Copyright (c) 2009 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.
 
 #ifndef VIEWS_CONTROLS_NATIVE_HOST_VIEW_GTK_H_
 #define VIEWS_CONTROLS_NATIVE_HOST_VIEW_GTK_H_
 
 #include <gtk/gtk.h>
 #include <string>
 
@@ skipping 10 matching lines @@
 // to it for the duration of its attachment. This is so the NativeViewHostGtk
 // can safely reparent the GtkWidget in multiple passes without having to worry
 // about the GtkWidget's refcnt falling to 0.
 class NativeViewHostGtk : public NativeViewHostWrapper {
  public:
   explicit NativeViewHostGtk(NativeViewHost* host);
   virtual ~NativeViewHostGtk();
 
   // Overridden from NativeViewHostWrapper:
   virtual void NativeViewAttached();
-  virtual void NativeViewDetaching();
+  virtual void NativeViewDetaching(bool destroyed);
   virtual void AddedToWidget();
   virtual void RemovedFromWidget();
   virtual void InstallClip(int x, int y, int w, int h);
   virtual bool HasInstalledClip();
   virtual void UninstallClip();
   virtual void ShowWidget(int x, int y, int w, int h);
   virtual void HideWidget();
   virtual void SetFocus();
 
  private:
@@ skipping 37 matching lines @@
   // The GtkFixed that contains the attached gfx::NativeView (used for
   // clipping).
   GtkWidget* fixed_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeViewHostGtk);
 };
 
 }  // namespace views
 
 #endif  // VIEWS_CONTROLS_NATIVE_HOST_VIEW_GTK_H_
-