Make RenderFrame(Host) own a RenderWidget(Host).

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index 55ee71666f00cdd1408e0c9456c7ec97d3c619a4..0540a041200a84689ef2ca409a295ef3755c69ee 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -760,6 +760,7 @@ bool RenderFrameImpl::OnMessageReceived(const IPC::Message& msg) {
     IPC_MESSAGE_HANDLER(FrameMsg_Navigate, OnNavigate)
     IPC_MESSAGE_HANDLER(FrameMsg_BeforeUnload, OnBeforeUnload)
     IPC_MESSAGE_HANDLER(FrameMsg_SwapOut, OnSwapOut)
+    IPC_MESSAGE_HANDLER(FrameMsg_NewWidgetForFrame, OnNewWidgetForFrame)
     IPC_MESSAGE_HANDLER(FrameMsg_Stop, OnStop)
     IPC_MESSAGE_HANDLER(FrameMsg_ContextMenuClosed, OnContextMenuClosed)
     IPC_MESSAGE_HANDLER(FrameMsg_CustomContextMenuAction,
@@ -1110,6 +1111,14 @@ void RenderFrameImpl::OnSwapOut(int proxy_routing_id) {
     render_view_->WasSwappedOut();
 }
 
+void RenderFrameImpl::OnNewWidgetForFrame(int routing_id_for_widget,
+                                          bool hidden) {
+  render_widget_ = RenderWidget::CreateForFrame(
+      routing_id_for_widget,
+      hidden,
+      render_view_->screen_info());
+}
+
 void RenderFrameImpl::OnContextMenuClosed(
     const CustomContextMenuContext& custom_context) {
   if (custom_context.request_id) {