Allow embedders to provide a custom view for popup (select box) widgets,

content/browser/web_contents/web_contents_view_gtk.cc

 // Copyright (c) 2012 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 "content/browser/web_contents/web_contents_view_gtk.h"
 
 #include <gdk/gdk.h>
 #include <gdk/gdkkeysyms.h>
 #include <gtk/gtk.h>
 
@@ skipping 131 matching lines @@
 
   // Renderer target DnD.
   drag_dest_.reset(new WebDragDestGtk(web_contents_, content_view));
 
   if (delegate_.get())
     drag_dest_->set_delegate(delegate_->GetDragDestDelegate());
 
   return view;
 }
 
+RenderWidgetHostView* WebContentsViewGtk::CreateViewForPopupWidget(
+    RenderWidgetHost* render_widget_host) {
+  return RenderWidgetHostViewPort::CreateViewForWidget(render_widget_host);
+}
+
 gfx::NativeView WebContentsViewGtk::GetNativeView() const {
   if (delegate_.get())
     return delegate_->GetNativeView();
 
   return expanded_.get();
 }
 
 gfx::NativeView WebContentsViewGtk::GetContentNativeView() const {
   RenderWidgetHostView* rwhv = web_contents_->GetRenderWidgetHostView();
   if (!rwhv)
@@ skipping 218 matching lines @@
   // We manually tell our RWHV to resize the renderer content.  This avoids
   // spurious resizes from GTK+.
   RenderWidgetHostView* rwhv = web_contents_->GetRenderWidgetHostView();
   if (rwhv)
     rwhv->SetSize(size);
   if (web_contents_->GetInterstitialPage())
     web_contents_->GetInterstitialPage()->SetSize(size);
 }
 
 }  // namespace content