Remove more mouse-specific code

sky/engine/platform/scroll/Scrollbar.cpp

 /*
  * Copyright (C) 2004, 2006, 2008 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.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 112 matching lines @@
     splitTrack(trackRect(), startTrackRect, thumbRect, endTrackRect);
     if (damageRect.intersects(thumbRect))
         paintThumb(context, thumbRect);
 }
 
 void Scrollbar::autoscrollTimerFired(Timer<Scrollbar>*)
 {
     autoscrollPressedPart(autoscrollTimerDelay());
 }
 
-static bool thumbUnderMouse(Scrollbar* scrollbar)
-{
-    int thumbPos = scrollbar->trackPosition() + scrollbar->thumbPosition();
-    int thumbLength = scrollbar->thumbLength();
-    return scrollbar->pressedPos() >= thumbPos && scrollbar->pressedPos() < thumbPos + thumbLength;
-}
-
 void Scrollbar::autoscrollPressedPart(double delay)
 {
     // Don't do anything for the thumb or if nothing was pressed.
     if (m_pressedPart == ThumbPart || m_pressedPart == NoPart)
         return;
 
-    // Handle the track.
-    if ((m_pressedPart == BackTrackPart || m_pressedPart == ForwardTrackPart) && thumbUnderMouse(this)) {
-        setHoveredPart(ThumbPart);
-        return;
-    }
-
     // Handle the arrows and track.
     if (m_scrollableArea && m_scrollableArea->scroll(pressedPartScrollDirection(), pressedPartScrollGranularity()))
         startTimerIfNeeded(delay);
 }
 
 void Scrollbar::startTimerIfNeeded(double delay)
 {
     // Don't do anything for the thumb.
     if (m_pressedPart == ThumbPart)
         return;
 
-    // Handle the track.  We halt track scrolling once the thumb is level
-    // with us.
-    if ((m_pressedPart == BackTrackPart || m_pressedPart == ForwardTrackPart) && thumbUnderMouse(this)) {
-        setHoveredPart(ThumbPart);
-        return;
-    }
-
     // We can't scroll if we've hit the beginning or end.
     ScrollDirection dir = pressedPartScrollDirection();
     if (dir == ScrollUp || dir == ScrollLeft) {
         if (m_currentPos == 0)
             return;
     } else {
         if (m_currentPos == maximum())
             return;
     }
 
@@ skipping 54 matching lines @@
     if (part == m_hoveredPart)
         return;
     m_hoveredPart = part;
 }
 
 void Scrollbar::setPressedPart(ScrollbarPart part)
 {
     m_pressedPart = part;
 }
 
-void Scrollbar::mouseEntered()
-{
-    if (m_scrollableArea)
-        m_scrollableArea->mouseEnteredScrollbar(this);
-}
-
-void Scrollbar::mouseExited()
-{
-    if (m_scrollableArea)
-        m_scrollableArea->mouseExitedScrollbar(this);
-    setHoveredPart(NoPart);
-}
-
 bool Scrollbar::isOverlayScrollbar() const
 {
     // FIXME(sky): Remove
     return true;
 }
 
 bool Scrollbar::shouldParticipateInHitTesting()
 {
     // Non-overlay scrollbars should always participate in hit testing.
     if (!isOverlayScrollbar())
@@ skipping 141 matching lines @@
         thumbRect.setWidth(thumbRect.width() - kScrollbarMargin);
         if (isLeftSideVerticalScrollbar())
             thumbRect.setX(thumbRect.x() + kScrollbarMargin);
     }
 
     DEFINE_STATIC_LOCAL(Color, color, (128, 128, 128, 128));
     context->fillRect(thumbRect, color);
 }
 
 } // namespace blink