Switch the inheritance of WebView from WebWidget to protected.

content/shell/renderer/layout_test/layout_test_content_renderer_client.cc

Index: content/shell/renderer/layout_test/layout_test_content_renderer_client.cc
diff --git a/content/shell/renderer/layout_test/layout_test_content_renderer_client.cc b/content/shell/renderer/layout_test/layout_test_content_renderer_client.cc
index 350372547833790b5212963f806454ccec8eb19f..554c9c3d0c23597ec7d0199caab92324a4501e25 100644
--- a/content/shell/renderer/layout_test/layout_test_content_renderer_client.cc
+++ b/content/shell/renderer/layout_test/layout_test_content_renderer_client.cc
@@ -36,6 +36,7 @@
 
 using blink::WebAudioDevice;
 using blink::WebClipboard;
+using blink::WebFrame;
 using blink::WebLocalFrame;
 using blink::WebMIDIAccessor;
 using blink::WebMIDIAccessorClient;
@@ -104,6 +105,12 @@ void LayoutTestContentRendererClient::RenderThreadStarted() {
 void LayoutTestContentRendererClient::RenderFrameCreated(
     RenderFrame* render_frame) {
   new LayoutTestRenderFrameObserver(render_frame);
+
+  test_runner::WebTestProxyBase* proxy =
+      GetWebTestProxyBase(render_frame->GetRenderView());
+  WebLocalFrame* frame = render_frame->GetWebFrame();
+  if (!frame->parent())
+    proxy->set_web_widget(frame->frameWidget());
 }
 
 void LayoutTestContentRendererClient::RenderViewCreated(
@@ -111,7 +118,6 @@ void LayoutTestContentRendererClient::RenderViewCreated(
   new ShellRenderViewObserver(render_view);
 
   test_runner::WebTestProxyBase* proxy = GetWebTestProxyBase(render_view);
-  proxy->set_web_widget(render_view->GetWebView());
   proxy->set_web_view(render_view->GetWebView());
   proxy->Reset();
   proxy->SetSendWheelGestures(UseGestureBasedWheelScrolling());