Revert "Reworks the clipping logic" and follow-up.

Source/core/layout/compositing/CompositingInputsUpdater.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/layout/compositing/CompositingInputsUpdater.h"
 
 #include "core/layout/LayoutBlock.h"
 #include "core/layout/compositing/CompositedDeprecatedPaintLayerMapping.h"
 #include "core/layout/compositing/DeprecatedPaintLayerCompositor.h"
 #include "core/paint/DeprecatedPaintLayer.h"
 #include "platform/TraceEvent.h"
 
 namespace blink {
 
 CompositingInputsUpdater::CompositingInputsUpdater(DeprecatedPaintLayer* rootLayer)
     : m_geometryMap(UseTransforms)
     , m_rootLayer(rootLayer)
 {
 }
 
 CompositingInputsUpdater::~CompositingInputsUpdater()
 {
 }
 
 void CompositingInputsUpdater::update()
 {
     TRACE_EVENT0("blink", "CompositingInputsUpdater::update");
-    m_rootLayer->clipper().precalculateAbsoluteClipRects();
     updateRecursive(m_rootLayer, DoNotForceUpdate, AncestorInfo());
 }
 
 static const DeprecatedPaintLayer* findParentLayerOnClippingContainerChain(const DeprecatedPaintLayer* layer)
 {
     LayoutObject* current = layer->layoutObject();
     while (current) {
         if (current->style()->position() == FixedPosition) {
             for (current = current->parent(); current && !current->canContainFixedPositionObjects(); current = current->parent()) {
                 // All types of clips apply to fixed-position descendants of other fixed-position elements.
@@ skipping 155 matching lines @@
     ASSERT(!layer->childNeedsCompositingInputsUpdate());
     ASSERT(!layer->needsCompositingInputsUpdate());
 
     for (DeprecatedPaintLayer* child = layer->firstChild(); child; child = child->nextSibling())
         assertNeedsCompositingInputsUpdateBitsCleared(child);
 }
 
 #endif
 
 } // namespace blink