Make TabContents own its infobar delegates....

chrome/browser/gtk/extension_view_gtk.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/gtk/extension_view_gtk.h"
 
 #include "chrome/browser/extensions/extension_host.h"
 #include "chrome/browser/gtk/extension_popup_gtk.h"
 #include "chrome/browser/renderer_host/render_view_host.h"
 #include "chrome/browser/renderer_host/render_widget_host_view_gtk.h"
@@ skipping 24 matching lines @@
   } else {
     pending_background_ = background;
   }
 }
 
 void ExtensionViewGtk::UpdatePreferredSize(const gfx::Size& new_size) {
   if (container_)
     container_->OnExtensionPreferredSizeChanged(this, new_size);
 }
 
-void ExtensionViewGtk::CreateWidgetHostView() {
-  DCHECK(!render_widget_host_view_);
-  render_widget_host_view_ = new RenderWidgetHostViewGtk(render_view_host());
-  render_widget_host_view_->InitAsChild();
-
-  extension_host_->CreateRenderViewSoon(render_widget_host_view_);
-}
-
 void ExtensionViewGtk::RenderViewCreated() {
   if (!pending_background_.empty() && render_view_host()->view()) {
     render_widget_host_view_->SetBackground(pending_background_);
     pending_background_.reset();
   }
 
   // Tell the renderer not to draw scrollbars in popups unless the
   // popups are at the maximum allowed size.
   gfx::Size largest_popup_size(ExtensionPopupGtk::kMaxWidth,
                                ExtensionPopupGtk::kMaxHeight);
   extension_host_->DisableScrollbarsForSmallWindows(largest_popup_size);
 }
+
+virtual ExtensionViewGtk::~ExtensionViewGtk() {
+  gtk_widget_unparent(native_view());
+}
+
+void ExtensionViewGtk::CreateWidgetHostView() {
+  DCHECK(!render_widget_host_view_);
+  render_widget_host_view_ = new RenderWidgetHostViewGtk(render_view_host());
+  render_widget_host_view_->InitAsChild();
+
+  extension_host_->CreateRenderViewSoon(render_widget_host_view_);
+}