Revert of Do not hide the old RenderWidgetHostView when commiting a navigation.

content/browser/frame_host/render_frame_host_manager.cc

Index: content/browser/frame_host/render_frame_host_manager.cc
diff --git a/content/browser/frame_host/render_frame_host_manager.cc b/content/browser/frame_host/render_frame_host_manager.cc
index 5653edfd699471ac1b26b453f068413c6a656f86..1a8acb96ba0062eb79562cb4dce53ce03442f662 100644
--- a/content/browser/frame_host/render_frame_host_manager.cc
+++ b/content/browser/frame_host/render_frame_host_manager.cc
@@ -2155,6 +2155,14 @@
         render_frame_host_->render_view_host());
   }
 
+  // For top-level frames, also hide the old RenderViewHost's view.
+  // TODO(creis): As long as show/hide are on RVH, we don't want to hide on
+  // subframe navigations or we will interfere with the top-level frame.
+  if (is_main_frame &&
+      old_render_frame_host->render_view_host()->GetWidget()->GetView()) {
+    old_render_frame_host->render_view_host()->GetWidget()->GetView()->Hide();
+  }
+
   // Make sure the size is up to date.  (Fix for bug 1079768.)
   delegate_->UpdateRenderViewSizeForRenderManager();