Make TabContents own its infobar delegates....

chrome/browser/gtk/extension_view_gtk.cc

Index: chrome/browser/gtk/extension_view_gtk.cc
===================================================================
--- chrome/browser/gtk/extension_view_gtk.cc	(revision 65711)
+++ chrome/browser/gtk/extension_view_gtk.cc	(working copy)
@@ -42,14 +42,6 @@
     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_);
@@ -62,3 +54,15 @@
                                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_);
+}