Check paint offset change after updatePaintOffsetTransform

third_party/WebKit/Source/core/paint/PrePaintTreeWalk.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/PrePaintTreeWalk.h"
 
 #include "core/dom/DocumentLifecycle.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
 #include "core/layout/LayoutMultiColumnSpannerPlaceholder.h"
@@ skipping 201 matching lines @@
 }
 
 void PrePaintTreeWalk::walk(const LayoutObject& object,
                             const PrePaintTreeWalkContext& parentContext) {
   PrePaintTreeWalkContext context(parentContext);
 
   // This must happen before updateContextForBoxPosition, because the
   // latter reads some of the state computed uere.
   updateAuxiliaryObjectProperties(object, context);
 
-  // Ensure the current context takes into account the box's position. This can
-  // force a subtree update due to paint offset changes and must precede any
-  // early out from the treewalk.
-  m_propertyTreeBuilder.updateContextForBoxPosition(object,
-                                                    context.treeBuilderContext);
-
   // Early out from the treewalk if possible.
   if (!object.needsPaintPropertyUpdate() &&
       !object.descendantNeedsPaintPropertyUpdate() &&
       !context.treeBuilderContext.forceSubtreeUpdate &&
       !context.paintInvalidatorContext.forcedSubtreeInvalidationFlags &&
       !object
            .shouldCheckForPaintInvalidationRegardlessOfPaintInvalidationState()) {
     return;
   }
 
@@ skipping 36 matching lines @@
           roundedIntPoint(context.treeBuilderContext.current.paintOffset);
       walk(*toFrameView(widget), context);
     }
     // TODO(pdr): Investigate RemoteFrameView (crbug.com/579281).
   }
 
   object.getMutableForPainting().clearPaintFlags();
 }
 
 }  // namespace blink