RenderWidgetHostViewChildFrame's called a virtual in its ctor.

content/browser/frame_host/render_widget_host_view_guest.cc

 // Copyright 2014 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/frame_host/render_widget_host_view_guest.h"
 
 #include <utility>
 
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
@@ skipping 47 matching lines @@
 
  private:
   RenderWidgetHostImpl* host_;
   float scale_factor_;
 
   DISALLOW_COPY_AND_ASSIGN(ScopedInputScaleDisabler);
 };
 
 }  // namespace
 
+// static
+RenderWidgetHostViewGuest* RenderWidgetHostViewGuest::Create(
+    RenderWidgetHost* widget,
+    BrowserPluginGuest* guest,
+    base::WeakPtr<RenderWidgetHostViewBase> platform_view) {
+  RenderWidgetHostViewGuest* view =
+      new RenderWidgetHostViewGuest(widget, guest, platform_view);
+  view->Init();
+  return view;
+}
+
 RenderWidgetHostViewGuest::RenderWidgetHostViewGuest(
     RenderWidgetHost* widget_host,
     BrowserPluginGuest* guest,
     base::WeakPtr<RenderWidgetHostViewBase> platform_view)
     : RenderWidgetHostViewChildFrame(widget_host),
       // |guest| is NULL during test.
       guest_(guest ? guest->AsWeakPtr() : base::WeakPtr<BrowserPluginGuest>()),
       platform_view_(platform_view) {
   gfx::NativeView view = GetNativeView();
   if (view)
@@ skipping 599 matching lines @@
         gesture_event.data.scrollUpdate.inertialPhase ==
             blink::WebGestureEvent::MomentumPhase) {
       return;
     }
     host_->ForwardGestureEvent(gesture_event);
     return;
   }
 }
 
 }  // namespace content