Always use the WebFrameWidget when attaching the root graphics

third_party/WebKit/Source/web/tests/VisualViewportTest.cpp

 // 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 "core/frame/VisualViewport.h"
 
 #include "core/dom/Document.h"
 #include "core/frame/FrameHost.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
@@ skipping 407 matching lines @@
 // prior to the VisualViewport being attached to the layer tree.
 TEST_P(ParameterizedVisualViewportTest, TestWebViewResizedBeforeAttachment)
 {
     initializeWithDesktopSettings();
     FrameView& frameView = *webViewImpl()->mainFrameImpl()->frameView();
     GraphicsLayer* rootGraphicsLayer =
         frameView.layoutView()->compositor()->rootGraphicsLayer();
 
     // Make sure that a resize that comes in while there's no root layer is
     // honoured when we attach to the layer tree.
-    webViewImpl()->setRootGraphicsLayer(nullptr);
+    WebFrameWidget* mainFrameWidget = static_cast<WebFrameWidget*>(webViewImpl()->mainFrame()->toWebLocalFrame()->frameWidget());
+    mainFrameWidget->setRootGraphicsLayer(nullptr);
     webViewImpl()->resize(IntSize(320, 240));
-    webViewImpl()->setRootGraphicsLayer(rootGraphicsLayer);
+    mainFrameWidget->setRootGraphicsLayer(rootGraphicsLayer);
 
     navigateTo("about:blank");
     webViewImpl()->updateAllLifecyclePhases();
 
     VisualViewport& visualViewport = frame()->page()->frameHost().visualViewport();
     EXPECT_FLOAT_SIZE_EQ(FloatSize(320, 240), visualViewport.containerLayer()->size());
 }
 
 // Make sure that the visibleRect method acurately reflects the scale and scroll location
 // of the viewport.
@@ skipping 1417 matching lines @@
     webViewImpl()->handleInputEvent(pinchUpdate);
 
     VisualViewport& visualViewport = webViewImpl()->page()->frameHost().visualViewport();
     FrameView& frameView = *webViewImpl()->mainFrameImpl()->frameView();
 
     EXPECT_FLOAT_POINT_EQ(FloatPoint(50, 50), visualViewport.location());
     EXPECT_FLOAT_POINT_EQ(FloatPoint(0, 0), frameView.scrollPositionDouble());
 }
 
 } // namespace