Remove some more frame-level scrolling machinery.

sky/engine/core/dom/Element.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012, 2013 Apple Inc. All rights reserved.
  *           (C) 2007 Eric Seidel (eric@webkit.org)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 443 matching lines @@
     return 0;
 }
 
 int Element::scrollLeft()
 {
     document().updateLayoutIgnorePendingStylesheets();
 
     if (document().documentElement() != this) {
         if (RenderBox* rend = renderBox())
             return adjustDoubleForAbsoluteZoom(rend->scrollLeft(), *rend);
-        return 0;
-    }
-
-    if (RuntimeEnabledFeatures::scrollTopLeftInteropEnabled()) {
-        if (FrameView* view = document().view()) {
-            if (RenderView* renderView = document().renderView())
-                return adjustDoubleForAbsoluteZoom(view->scrollX(), *renderView);
-        }
     }
 
     return 0;
 }
 
 int Element::scrollTop()
 {
     document().updateLayoutIgnorePendingStylesheets();
 
     if (document().documentElement() != this) {
         if (RenderBox* rend = renderBox())
             return adjustLayoutUnitForAbsoluteZoom(rend->scrollTop(), *rend);
-        return 0;
-    }
-
-    if (RuntimeEnabledFeatures::scrollTopLeftInteropEnabled()) {
-        if (FrameView* view = document().view()) {
-            if (RenderView* renderView = document().renderView())
-                return adjustDoubleForAbsoluteZoom(view->scrollY(), *renderView);
-        }
     }
 
     return 0;
 }
 
 void Element::setScrollLeft(int newLeft)
 {
     document().updateLayoutIgnorePendingStylesheets();
 
     if (document().documentElement() != this) {
         if (RenderBox* rend = renderBox())
             rend->setScrollLeft(LayoutUnit::fromFloatRound(newLeft * rend->style()->effectiveZoom()));
-        return;
-    }
-
-    if (RuntimeEnabledFeatures::scrollTopLeftInteropEnabled()) {
-        LocalFrame* frame = document().frame();
-        if (!frame)
-            return;
-        FrameView* view = frame->view();
-        if (!view)
-            return;
-
-        view->setScrollPosition(IntPoint(roundf(newLeft * frame->pageZoomFactor()), view->scrollY()));
     }
 }
 
 void Element::setScrollLeft(const Dictionary& scrollOptionsHorizontal, ExceptionState& exceptionState)
 {
     String scrollBehaviorString;
     ScrollBehavior scrollBehavior = ScrollBehaviorAuto;
     if (DictionaryHelper::get(scrollOptionsHorizontal, "behavior", scrollBehaviorString)) {
         if (!ScrollableArea::scrollBehaviorFromString(scrollBehaviorString, scrollBehavior)) {
             exceptionState.throwTypeError("The ScrollBehavior provided is invalid.");
@@ skipping 11 matching lines @@
     setScrollLeft(position);
 }
 
 void Element::setScrollTop(int newTop)
 {
     document().updateLayoutIgnorePendingStylesheets();
 
     if (document().documentElement() != this) {
         if (RenderBox* rend = renderBox())
             rend->setScrollTop(LayoutUnit::fromFloatRound(newTop * rend->style()->effectiveZoom()));
-        return;
-    }
-
-    if (RuntimeEnabledFeatures::scrollTopLeftInteropEnabled()) {
-        LocalFrame* frame = document().frame();
-        if (!frame)
-            return;
-        FrameView* view = frame->view();
-        if (!view)
-            return;
-
-        view->setScrollPosition(IntPoint(view->scrollX(), roundf(newTop * frame->pageZoomFactor())));
     }
 }
 
 void Element::setScrollTop(const Dictionary& scrollOptionsVertical, ExceptionState& exceptionState)
 {
     String scrollBehaviorString;
     ScrollBehavior scrollBehavior = ScrollBehaviorAuto;
     if (DictionaryHelper::get(scrollOptionsVertical, "behavior", scrollBehaviorString)) {
         if (!ScrollableArea::scrollBehaviorFromString(scrollBehaviorString, scrollBehavior)) {
             exceptionState.throwTypeError("The ScrollBehavior provided is invalid.");
@@ skipping 1595 matching lines @@
 {
 #if ENABLE(OILPAN)
     if (hasRareData())
         visitor->trace(elementRareData());
     visitor->trace(m_elementData);
 #endif
     ContainerNode::trace(visitor);
 }
 
 } // namespace blink