Early out PrePaintTreeWalk::walk() earlier

third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.cpp

 // Copyright 2015 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 "core/paint/PaintPropertyTreeBuilder.h"
 
 #include "core/dom/DOMNodeIds.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/Settings.h"
@@ skipping 901 matching lines @@
     // Similar adjustment is done in LayoutTableCell::offsetFromContainer().
     if (object.isTableCell()) {
       LayoutObject* parentRow = object.parent();
       DCHECK(parentRow && parentRow->isTableRow());
       context.current.paintOffset.moveBy(
           -toLayoutBox(parentRow)->physicalLocation());
     }
   }
 }
 
-void PaintPropertyTreeBuilder::updateContextForBoxPosition(
+void PaintPropertyTreeBuilder::updateForObjectLocation(
     const LayoutObject& object,
     PaintPropertyTreeBuilderContext& context) {
   if (object.isBoxModelObject()) {
     updatePaintOffset(toLayoutBoxModelObject(object), context);
     updatePaintOffsetTranslation(toLayoutBoxModelObject(object), context);
   }
 
   if (object.paintOffset() == context.current.paintOffset)
     return;
 
   // Many paint properties depend on paint offset so we force an update of
   // the entire subtree on paint offset changes.
   context.forceSubtreeUpdate = true;
 
   if (RuntimeEnabledFeatures::slimmingPaintV2Enabled()) {
     object.getMutableForPainting().setShouldDoFullPaintInvalidation(
         PaintInvalidationLocationChange);
   }
   object.getMutableForPainting().setPaintOffset(context.current.paintOffset);
 }
 
 void PaintPropertyTreeBuilder::updatePropertiesForSelf(
     const LayoutObject& object,
     PaintPropertyTreeBuilderContext& context) {
+  // This is not in FindObjectPropertiesNeedingUpdateScope because paint offset
+  // can change without needsPaintPropertyUpdate.
+  updateForObjectLocation(object, context);
+
 #if DCHECK_IS_ON()
   FindObjectPropertiesNeedingUpdateScope checkNeedsUpdateScope(object, context);
 #endif
 
   if (object.isBoxModelObject() || object.isSVG()) {
     updateTransform(object, context);
     if (RuntimeEnabledFeatures::slimmingPaintV2Enabled())
       updateEffect(object, context);
     updateCssClip(object, context);
     updateLocalBorderBoxContext(object, context);
@@ skipping 15 matching lines @@
   updateOverflowClip(object, context);
   updatePerspective(object, context);
   updateSvgLocalToBorderBoxTransform(object, context);
   updateScrollAndScrollTranslation(object, context);
   updateOutOfFlowContext(object, context);
 
   context.forceSubtreeUpdate |= object.subtreeNeedsPaintPropertyUpdate();
 }
 
 }  // namespace blink