Move allowsBrokenNullLayerTreeView calls from WebViewClient to WebWidgetClient.

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 be61076b8df576a730de4c33d27893a7b802236b..a3a6911439b44f7b9a665e5dabaf3ef257c93271 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -2004,10 +2004,6 @@ void RenderViewImpl::initializeLayerTreeView() {
   }
 }
 
-bool RenderViewImpl::allowsBrokenNullLayerTreeView() const {
-  return RenderWidget::allowsBrokenNullLayerTreeView();
-}
-
 void RenderViewImpl::closeWidgetSoon() {
   RenderWidget::closeWidgetSoon();
 }
@@ -2107,6 +2103,10 @@ blink::WebRect RenderViewImpl::windowResizerRect() {
   return RenderWidget::windowResizerRect();
 }
 
+blink::WebWidgetClient* RenderViewImpl::widgetClient() {
+  return static_cast<RenderWidget*>(this);
+}
+
 // blink::WebFrameClient -----------------------------------------------------
 
 void RenderViewImpl::Repaint(const gfx::Size& size) {