Delete most of rendering/compositing.

sky/engine/core/rendering/RenderLayerScrollableArea.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
  *   Randall Jesup <rjesup@wgate.com>
@@ skipping 39 matching lines @@
 #include "sky/engine/core/frame/FrameView.h"
 #include "sky/engine/core/frame/LocalFrame.h"
 #include "sky/engine/core/inspector/InspectorTraceEvents.h"
 #include "sky/engine/core/page/Chrome.h"
 #include "sky/engine/core/page/EventHandler.h"
 #include "sky/engine/core/page/FocusController.h"
 #include "sky/engine/core/page/Page.h"
 #include "sky/engine/core/rendering/HitTestResult.h"
 #include "sky/engine/core/rendering/RenderGeometryMap.h"
 #include "sky/engine/core/rendering/RenderView.h"
-#include "sky/engine/core/rendering/compositing/RenderLayerCompositor.h"
 #include "sky/engine/platform/PlatformGestureEvent.h"
 #include "sky/engine/platform/PlatformMouseEvent.h"
 #include "sky/engine/platform/graphics/GraphicsContextStateSaver.h"
 #include "sky/engine/platform/graphics/GraphicsLayer.h"
 #include "sky/engine/platform/scroll/ScrollAnimator.h"
 #include "sky/engine/platform/scroll/Scrollbar.h"
 #include "sky/engine/public/platform/Platform.h"
 
 namespace blink {
 
@@ skipping 166 matching lines @@
     TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "ScrollLayer", "data", InspectorScrollLayerEvent::data(&box()));
 
     const RenderLayerModelObject* paintInvalidationContainer = box().containerForPaintInvalidation();
 
     // Update the positions of our child layers (if needed as only fixed layers should be impacted by a scroll).
     // We don't update compositing layers, because we need to do a deep update from the compositing ancestor.
     if (!frameView->isInPerformLayout()) {
         // If we're in the middle of layout, we'll just update layers once layout has finished.
         layer()->clipper().clearClipRectsIncludingDescendants();
         box().setPreviousPaintInvalidationRect(box().boundsRectForPaintInvalidation(paintInvalidationContainer));
-        updateCompositingLayersAfterScroll();
     }
 
     // The caret rect needs to be invalidated after scrolling
     frame->selection().setCaretRectNeedsUpdate();
 
     FloatQuad quadForFakeMouseMoveEvent = FloatQuad(layer()->renderer()->previousPaintInvalidationRect());
 
     quadForFakeMouseMoveEvent = paintInvalidationContainer->localToAbsoluteQuad(quadForFakeMouseMoveEvent);
     frame->eventHandler().dispatchFakeMouseMoveEventSoonInQuad(quadForFakeMouseMoveEvent);
 
@@ skipping 549 matching lines @@
     m_scrollsOverflow = hasOverflow && isVisibleToHitTest;
     if (didScrollOverflow == scrollsOverflow())
         return;
 
     if (m_scrollsOverflow)
         frameView->addScrollableArea(this);
     else
         frameView->removeScrollableArea(this);
 }
 
-void RenderLayerScrollableArea::updateCompositingLayersAfterScroll()
-{
-    RenderLayerCompositor* compositor = box().view()->compositor();
-    if (compositor->inCompositingMode()) {
-        layer()->setNeedsCompositingInputsUpdate();
-    }
-}
-
-static bool layerNeedsCompositedScrolling(const RenderLayer* layer)
-{
-    return layer->scrollsOverflow()
-        && layer->compositor()->preferCompositingToLCDTextEnabled()
-        && !layer->hasDescendantWithClipPath()
-        && !layer->hasAncestorWithClipPath();
-}
-
-void RenderLayerScrollableArea::updateNeedsCompositedScrolling()
-{
-    const bool needsCompositedScrolling = layerNeedsCompositedScrolling(layer());
-    if (static_cast<bool>(m_needsCompositedScrolling) != needsCompositedScrolling) {
-        m_needsCompositedScrolling = needsCompositedScrolling;
-        layer()->didUpdateNeedsCompositedScrolling();
-    }
-}
-
 void RenderLayerScrollableArea::setTopmostScrollChild(RenderLayer* scrollChild)
 {
     // We only want to track the topmost scroll child for scrollable areas with
     // overlay scrollbars.
     if (!hasOverlayScrollbars())
         return;
     m_nextTopmostScrollChild = scrollChild;
 }
 
 } // namespace blink