Remove a bunch of frame-level scrolling machinery.

sky/engine/core/events/MouseRelatedEvent.cpp

 /*
  * Copyright (C) 2001 Peter Kelly (pmk@post.com)
  * Copyright (C) 2001 Tobias Anton (anton@stud.fbi.fh-darmstadt.de)
  * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2003, 2005, 2006, 2008 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 30 matching lines @@
 MouseRelatedEvent::MouseRelatedEvent(const AtomicString& eventType, bool canBubble, bool cancelable, PassRefPtrWillBeRawPtr<AbstractView> abstractView,
                                      int detail, const IntPoint& screenLocation, const IntPoint& windowLocation,
                                      const IntPoint& movementDelta,
                                      bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, bool isSimulated)
     : UIEventWithKeyState(eventType, canBubble, cancelable, abstractView, detail, ctrlKey, altKey, shiftKey, metaKey)
     , m_screenLocation(screenLocation)
     , m_movementDelta(movementDelta)
     , m_isSimulated(isSimulated)
 {
     LayoutPoint adjustedPageLocation;
-    LayoutPoint scrollPosition;
 
     LocalFrame* frame = view() ? view()->frame() : 0;
     if (frame && !isSimulated) {
         if (FrameView* frameView = frame->view()) {
-            scrollPosition = frameView->scrollPosition();
             adjustedPageLocation = frameView->windowToContents(windowLocation);
             float scaleFactor = 1 / frame->pageZoomFactor();
             if (scaleFactor != 1.0f) {
                 adjustedPageLocation.scale(scaleFactor, scaleFactor);
-                scrollPosition.scale(scaleFactor, scaleFactor);
             }
         }
     }
 
-    m_clientLocation = adjustedPageLocation - toLayoutSize(scrollPosition);
+    m_clientLocation = adjustedPageLocation;
     m_pageLocation = adjustedPageLocation;
 
     initCoordinates();
 }
 
 void MouseRelatedEvent::initCoordinates()
 {
     // Set up initial values for coordinates.
     // Correct values are computed lazily, see computeRelativePosition.
     m_layerLocation = m_pageLocation;
@@ skipping 134 matching lines @@
     // See Microsoft documentation and <http://www.quirksmode.org/dom/w3c_events.html>.
     return m_clientLocation.y();
 }
 
 void MouseRelatedEvent::trace(Visitor* visitor)
 {
     UIEventWithKeyState::trace(visitor);
 }
 
 } // namespace blink