Implement RenderWidgetHostViewViews::Destroy. See RWHVGtk for reference.

chrome/browser/renderer_host/render_widget_host_view_views.cc

 // Copyright (c) 2010 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 "chrome/browser/renderer_host/render_widget_host_view_views.h"
 
 #include <algorithm>
 #include <string>
 
 #include "app/l10n_util.h"
@@ skipping 275 matching lines @@
   }
 }
 
 void RenderWidgetHostViewViews::RenderViewGone(base::TerminationStatus status,
                                                int error_code) {
   GetRenderWidgetHost()->ViewDestroyed();
   Destroy();
 }
 
 void RenderWidgetHostViewViews::Destroy() {
-  // TODO(anicolao): deal with any special popup cleanup
-  NOTIMPLEMENTED();
+  // host_'s destruction brought us here, null it out so we don't use it
+  host_ = NULL;

[bryeung, 2011/01/19 18:13:57]

You don't need the DeleteSoon call that RWHVGtk has?

 }
 
 void RenderWidgetHostViewViews::SetTooltipText(const std::wstring& tip) {
   // TODO(anicolao): decide if we want tooltips for touch (none specified
   // right now/might want a press-and-hold display)
   // NOTIMPLEMENTED(); ... too annoying, it triggers for every mousemove
 }
 
 void RenderWidgetHostViewViews::SelectionChanged(const std::string& text) {
   // TODO(anicolao): deal with the clipboard without GTK
@@ skipping 445 matching lines @@
 }
 
 // static
 RenderWidgetHostView*
     RenderWidgetHostView::GetRenderWidgetHostViewFromNativeView(
         gfx::NativeView widget) {
   gpointer user_data = g_object_get_data(G_OBJECT(widget),
                                          kRenderWidgetHostViewKey);
   return reinterpret_cast<RenderWidgetHostView*>(user_data);
 }