Remove more frame-level scrolling machinery.

sky/engine/core/rendering/RenderBlockFlow.cpp

 /*
  * Copyright (C) 2013 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 2052 matching lines @@
     }
 
     return logicalBottom;
 }
 
 bool RenderBlockFlow::hitTestFloats(const HitTestRequest& request, HitTestResult& result, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset)
 {
     if (!m_floatingObjects)
         return false;
 
-    LayoutPoint adjustedLocation = accumulatedOffset;
-    if (isRenderView()) {
-        adjustedLocation += toLayoutSize(toRenderView(this)->frameView()->scrollPosition());
-    }
-
     const FloatingObjectSet& floatingObjectSet = m_floatingObjects->set();
     FloatingObjectSetIterator begin = floatingObjectSet.begin();
     for (FloatingObjectSetIterator it = floatingObjectSet.end(); it != begin;) {
         --it;
         FloatingObject* floatingObject = it->get();
         if (floatingObject->shouldPaint() && !floatingObject->renderer()->hasSelfPaintingLayer()) {
             LayoutUnit xOffset = xPositionForFloatIncludingMargin(floatingObject) - floatingObject->renderer()->x();
             LayoutUnit yOffset = yPositionForFloatIncludingMargin(floatingObject) - floatingObject->renderer()->y();
-            LayoutPoint childPoint = flipFloatForWritingModeForChild(floatingObject, adjustedLocation + LayoutSize(xOffset, yOffset));
+            LayoutPoint childPoint = flipFloatForWritingModeForChild(floatingObject, accumulatedOffset + LayoutSize(xOffset, yOffset));
             if (floatingObject->renderer()->hitTest(request, result, locationInContainer, childPoint)) {
                 updateHitTestResult(result, locationInContainer.point() - toLayoutSize(childPoint));
                 return true;
             }
         }
     }
 
     return false;
 }
 
@@ skipping 177 matching lines @@
 RenderBlockFlow::RenderBlockFlowRareData& RenderBlockFlow::ensureRareData()
 {
     if (m_rareData)
         return *m_rareData;
 
     m_rareData = adoptPtr(new RenderBlockFlowRareData(this));
     return *m_rareData;
 }
 
 } // namespace blink