RenderWidgetHostViewChildFrame's called a virtual in its ctor.

content/browser/frame_host/render_widget_host_view_guest_unittest.cc

Index: content/browser/frame_host/render_widget_host_view_guest_unittest.cc
diff --git a/content/browser/frame_host/render_widget_host_view_guest_unittest.cc b/content/browser/frame_host/render_widget_host_view_guest_unittest.cc
index 6946b4ef8604d872f21689b6919371b0a612dd4a..52038f1b490996590d81cd619cc1484dc66aa91e 100644
--- a/content/browser/frame_host/render_widget_host_view_guest_unittest.cc
+++ b/content/browser/frame_host/render_widget_host_view_guest_unittest.cc
@@ -70,7 +70,7 @@ class RenderWidgetHostViewGuestTest : public testing::Test {
     int32_t routing_id = process_host->GetNextRoutingID();
     widget_host_ =
         new RenderWidgetHostImpl(&delegate_, process_host, routing_id, false);
-    view_ = new RenderWidgetHostViewGuest(
+    view_ = RenderWidgetHostViewGuest::Create(
         widget_host_, NULL,
         (new TestRenderWidgetHostView(widget_host_))->GetWeakPtr());
   }
@@ -190,7 +190,7 @@ class RenderWidgetHostViewGuestSurfaceTest
     int32_t routing_id = process_host->GetNextRoutingID();
     widget_host_ =
         new RenderWidgetHostImpl(&delegate_, process_host, routing_id, false);
-    view_ = new RenderWidgetHostViewGuest(
+    view_ = RenderWidgetHostViewGuest::Create(
         widget_host_, browser_plugin_guest_,
         (new TestRenderWidgetHostView(widget_host_))->GetWeakPtr());
   }