Fix tests to avoid page scale reset when setting page scale.

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 197 matching lines @@
 
     DOMString counterValue(Element element);
     long pageNumber(Element element, optional float pageWidth, optional float pageHeight);
     DOMString[] shortcutIconURLs(Document document);
     DOMString[] allIconURLs(Document document);
     long numberOfPages(optional double pageWidthInPixels, optional double pageHeightInPixels);
     [RaisesException] DOMString pageProperty(DOMString propertyName, long pageNumber);
     [RaisesException] DOMString pageSizeAndMarginsInPixels(long pageIndex, long width, long height, long marginTop, long marginRight, long marginBottom, long marginLeft);
 
     [RaisesException] void setDeviceScaleFactor(float scaleFactor);
-    [RaisesException] void setPageScaleFactor(float scaleFactor, long x, long y);
 
     [RaisesException] void setIsCursorVisible(Document document, boolean isVisible);
 
     void webkitWillEnterFullScreenForElement(Document document, Element element);
     void webkitDidEnterFullScreenForElement(Document document, Element element);
     void webkitWillExitFullScreenForElement(Document document, Element element);
     void webkitDidExitFullScreenForElement(Document document, Element element);
 
     void registerURLSchemeAsBypassingContentSecurityPolicy(DOMString scheme);
     void removeURLSchemeRegisteredAsBypassingContentSecurityPolicy(DOMString scheme);
@@ skipping 25 matching lines @@
     void enableMockSpeechSynthesizer();
 
     [RaisesException] DOMString getImageSourceURL(Element element);
 
     boolean isSelectPopupVisible(Node node);
 
     [RaisesException] ClientRect selectionBounds();
 
     boolean loseSharedGraphicsContext3D();
 };