Remove more frame-level scrolling machinery.

sky/engine/core/frame/LocalFrame.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Simon Hausmann <hausmann@kde.org>
  *                     2000 Stefan Schimanski <1Stein@gmx.de>
  *                     2001 George Staikos <staikos@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2005 Alexey Proskuryakov <ap@nypop.com>
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
@@ skipping 365 matching lines @@
         return;
 
     Page* page = this->page();
     if (!page)
         return;
 
     Document* document = this->document();
     if (!document)
         return;
 
-    if (m_pageZoomFactor != pageZoomFactor) {
-        if (FrameView* view = this->view()) {
-            // Update the scroll position when doing a full page zoom, so the content stays in relatively the same position.
-            LayoutPoint scrollPosition = view->scrollPosition();
-            float percentDifference = (pageZoomFactor / m_pageZoomFactor);
-            view->setScrollPosition(IntPoint(scrollPosition.x() * percentDifference, scrollPosition.y() * percentDifference));
-        }
-    }
-
     m_pageZoomFactor = pageZoomFactor;
     m_textZoomFactor = textZoomFactor;
 
     document->setNeedsStyleRecalc(SubtreeStyleChange);
     document->updateLayoutIgnorePendingStylesheets();
 }
 
 void LocalFrame::deviceOrPageScaleFactorChanged()
 {
     document()->mediaQueryAffectingValueChanged();
@@ skipping 25 matching lines @@
 {
     if (!m_host)
         return 0;
 
     double ratio = m_host->deviceScaleFactor();
     ratio *= pageZoomFactor();
     return ratio;
 }
 
 } // namespace blink