Fix crash/leak issue in native_view_host_gtk.cc.

views/controls/native/native_view_host.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_NATIVE_VIEW_HOST_H_
 #define VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_H_
 
 #include <string>
 
 #include "app/gfx/native_widget_types.h"
@@ skipping 63 matching lines @@
   virtual void Paint(gfx::Canvas* canvas);
   virtual void VisibilityChanged(View* starting_from, bool is_visible);
   virtual void Focus();
 
  protected:
   virtual void VisibleBoundsInRootChanged();
   virtual void ViewHierarchyChanged(bool is_add, View* parent, View* child);
   virtual std::string GetClassName() const;
 
  private:
+  // Detach the native view. |destroyed| is true if the native view is
+  // detached because it's being destroyed, or false otherwise.
+  void Detach(bool destroyed);
+
   // The attached native view.
   gfx::NativeView native_view_;
 
   // A platform-specific wrapper that does the OS-level manipulation of the
   // attached gfx::NativeView.
   scoped_ptr<NativeViewHostWrapper> native_wrapper_;
 
   // The preferred size of this View
   gfx::Size preferred_size_;
 
   // True if the native view is being resized using the fast method described
   // in the setter/accessor above.
   bool fast_resize_;
 
   // The view that should be given focus when this NativeViewHost is focused.
   View* focus_view_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeViewHost);
 };
 
 }  // namespace views
 
 #endif  // VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_H_