Update layout tests to use internals.visualViewport APIs.

third_party/WebKit/Source/core/testing/Internals.idl

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 314 matching lines @@
 
     DictionaryTest dictionaryTest();
     UnionTypesTest unionTypesTest();
     [RaisesException, TypeChecking=Interface] void setScrollChain(ScrollState scrollState, Element[] elements);
     void forceBlinkGCWithoutV8GC();
 
     DOMString selectedHTMLForClipboard();
     DOMString selectedTextForClipboard();
 
     void setVisualViewportOffset(long x, long y);
+    int visualViewportHeight();
+    int visualViewportWidth();
+    double visualViewportScrollX();
+    double visualViewportScrollY();
 
     bool magnifyScaleAroundAnchor(float offset, float x, float y);
 
     boolean isUseCounted(Document document, long useCounterId);
 
     iterable<long>;
 
     [Unscopeable] readonly attribute DOMString unscopeableAttribute;
     [Unscopeable] DOMString unscopeableMethod();
 
     ClientRectList focusRingRects(Element element);
     ClientRectList outlineRects(Element element);
     void setCapsLockState(boolean enabled);
     void setSelectionPaintingWithoutSelectionGapsEnabled(boolean enabled);
 
     // Returns whether the scrollbar was able to be shown or hidden; not all platforms
     // support overlay scrollbars.
     bool setScrollbarVisibilityInScrollableArea(Node node, boolean visible);
 
     void forceRestrictIFramePermissions();
     [RaisesException] double monotonicTimeToZeroBasedDocumentTime(double platformTime);
 };