Turn the flag off and see what happens

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index d0952826e06fec11f42a7274175c467bcbefac48..3eb809de1634de7432623495050b19f0bc7d861c 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -956,11 +956,11 @@ void RenderViewImpl::Initialize(RenderViewImplParams* params) {
 
   ApplyWebPreferences(webkit_preferences_, webview());
 
-  main_render_frame_.reset(
-      RenderFrameImpl::Create(this, params->main_frame_routing_id));
+  main_render_frame_ =
+      RenderFrameImpl::Create(this, params->main_frame_routing_id);
   // The main frame WebFrame object is closed by
   // RenderViewImpl::frameDetached().
-  webview()->setMainFrame(WebFrame::create(main_render_frame_.get()));
+  webview()->setMainFrame(WebFrame::create(main_render_frame_));
 
   if (switches::IsTouchDragDropEnabled())
     webview()->settings()->setTouchDragDropEnabled(true);
@@ -2525,7 +2525,7 @@ bool RenderViewImpl::enumerateChosenDirectory(
 
 void RenderViewImpl::initializeHelperPluginWebFrame(
     WebKit::WebHelperPlugin* plugin) {
-  plugin->initializeFrame(main_render_frame_.get());
+  plugin->initializeFrame(main_render_frame_);
 }
 
 void RenderViewImpl::didStartLoading() {