Re-land:

chrome/browser/ui/views/constrained_html_delegate_gtk.cc

Index: chrome/browser/ui/views/constrained_html_delegate_gtk.cc
===================================================================
--- chrome/browser/ui/views/constrained_html_delegate_gtk.cc	(revision 85284)
+++ chrome/browser/ui/views/constrained_html_delegate_gtk.cc	(working copy)
@@ -70,7 +70,8 @@
 ConstrainedHtmlDelegateGtk::ConstrainedHtmlDelegateGtk(
     Profile* profile,
     HtmlDialogUIDelegate* delegate)
-    : HtmlDialogTabContentsDelegate(profile),
+    : views::WidgetGtk(new views::Widget),
+      HtmlDialogTabContentsDelegate(profile),
       html_tab_contents_(profile, NULL, MSG_ROUTING_NONE, NULL, NULL),
       tab_container_(NULL),
       html_delegate_(delegate),
@@ -86,10 +87,11 @@
                                           PageTransition::START_PAGE);
 
   views::Widget::InitParams params(views::Widget::InitParams::TYPE_CONTROL);
+  params.native_widget = this;
   GetWidget()->Init(params);
 
   tab_container_ = new TabContentsContainer;
-  SetContentsView(tab_container_);
+  GetWidget()->SetContentsView(tab_container_);
   tab_container_->ChangeTabContents(&html_tab_contents_);
 
   gfx::Size dialog_size;