Sets a transparent background for out-of-process subframes.

content/renderer/render_widget.cc

 // Copyright (c) 2012 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/renderer/render_widget.h"
 
 #include <utility>
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
@@ skipping 536 matching lines @@
   // this function returns.
   if (widget->DoInit(MSG_ROUTING_NONE,
                      RenderWidget::CreateWebFrameWidget(widget.get(), frame),
                      nullptr)) {
     return widget.get();
   }
   return nullptr;
 }
 
 // static
-blink::WebWidget* RenderWidget::CreateWebFrameWidget(
+blink::WebFrameWidget* RenderWidget::CreateWebFrameWidget(
     RenderWidget* render_widget,
     blink::WebLocalFrame* frame) {
   if (!frame->parent()) {
     // TODO(dcheng): The main frame widget currently has a special case.
     // Eliminate this once WebView is no longer a WebWidget.
     return blink::WebFrameWidget::create(render_widget, frame->view(), frame);
   }
   return blink::WebFrameWidget::create(render_widget, frame);
 }
 
@@ skipping 1726 matching lines @@
   video_hole_frames_.RemoveObserver(frame);
 }
 #endif  // defined(VIDEO_HOLE)
 
 void RenderWidget::OnWaitNextFrameForTests(int routing_id) {
   QueueMessage(new ViewHostMsg_WaitForNextFrameForTests_ACK(routing_id),
                MESSAGE_DELIVERY_POLICY_WITH_VISUAL_STATE);
 }
 
 }  // namespace content