Delete a bunch of noop paint invalidation code.

sky/engine/platform/scroll/ScrollableArea.cpp

 /*
  * Copyright (c) 2010, Google Inc. All rights reserved.
  * Copyright (C) 2008, 2011 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 29 matching lines @@
 #include "sky/engine/public/platform/WebString.h"
 #include "sky/engine/wtf/PassOwnPtr.h"
 
 static const int kPixelsPerLineStep = 40;
 static const float kMinFractionToStepWhenPaging = 0.875f;
 
 namespace blink {
 
 struct SameSizeAsScrollableArea {
     virtual ~SameSizeAsScrollableArea();
-    IntRect scrollbarDamage[2];
     void* pointer;
     unsigned bitfields : 16;
     IntPoint origin;
 };
 
 COMPILE_ASSERT(sizeof(ScrollableArea) == sizeof(SameSizeAsScrollableArea), ScrollableArea_should_stay_small);
 
 int ScrollableArea::pixelsPerLineStep()
 {
     return kPixelsPerLineStep;
@@ skipping 105 matching lines @@
     setScrollOffset(position);
 
     Scrollbar* verticalScrollbar = this->verticalScrollbar();
 
     // Tell the scrollbars to update their thumb postions.
     if (Scrollbar* horizontalScrollbar = this->horizontalScrollbar()) {
         horizontalScrollbar->offsetDidChange();
         if (horizontalScrollbar->isOverlayScrollbar()) {
             if (!verticalScrollbar)
                 horizontalScrollbar->invalidate();
-            else {
-                // If there is both a horizontalScrollbar and a verticalScrollbar,
-                // then we must also invalidate the corner between them.
-                IntRect boundsAndCorner = horizontalScrollbar->boundsRect();
-                boundsAndCorner.setWidth(boundsAndCorner.width() + verticalScrollbar->width());
-                horizontalScrollbar->invalidateRect(boundsAndCorner);
-            }
         }
     }
     if (verticalScrollbar) {
         verticalScrollbar->offsetDidChange();
         if (verticalScrollbar->isOverlayScrollbar())
             verticalScrollbar->invalidate();
     }
 
     if (scrollPosition() != oldPosition)
         scrollAnimator()->notifyContentAreaScrolled(scrollPosition() - oldPosition);
@@ skipping 119 matching lines @@
 
     if (Scrollbar* scrollbar = horizontalScrollbar()) {
         scrollbar->invalidate();
     }
 
     if (Scrollbar* scrollbar = verticalScrollbar()) {
         scrollbar->invalidate();
     }
 }
 
-void ScrollableArea::invalidateScrollbar(Scrollbar* scrollbar, const IntRect& rect)
-{
-    invalidateScrollbarRect(scrollbar, rect);
-}
-
 bool ScrollableArea::scheduleAnimation()
 {
     WTF_LOG(ScriptedAnimationController, "ScrollableArea::scheduleAnimation: window = %d",
         hostWindow() ? 1 : 0);
     if (HostWindow* window = hostWindow()) {
         window->scheduleAnimation();
         return true;
     }
     return false;
 }
@@ skipping 18 matching lines @@
 {
     return scrollSize(orientation);
 }
 
 float ScrollableArea::pixelStep(ScrollbarOrientation) const
 {
     return 1;
 }
 
 } // namespace blink