Move clearPaintInvalidatinFlags after subtree walk

third_party/WebKit/Source/core/layout/LayoutObject.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2011 Apple Inc.
  *               All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved.
  *               (http://www.torchmobile.com/)
@@ skipping 1131 matching lines @@
   ensureIsReadyForPaintInvalidation();
 
   // If we didn't need paint invalidation then our children don't need as well.
   // Skip walking down the tree as everything should be fine below us.
   if (!shouldCheckForPaintInvalidation(paintInvalidationState))
     return;
 
   PaintInvalidationState newPaintInvalidationState(paintInvalidationState,
                                                    *this);
 
-  if (mayNeedPaintInvalidationSubtree())
+  if (mayNeedPaintInvalidationSubtree()) {
     newPaintInvalidationState
         .setForceSubtreeInvalidationCheckingWithinContainer();
+  }
 
   PaintInvalidationReason reason =
       invalidatePaintIfNeeded(newPaintInvalidationState);
-  clearPaintInvalidationFlags();
-
   newPaintInvalidationState.updateForChildren(reason);
   invalidatePaintOfSubtreesIfNeeded(newPaintInvalidationState);
+
+  clearPaintInvalidationFlags();
 }
 
 DISABLE_CFI_PERF
 void LayoutObject::invalidatePaintOfSubtreesIfNeeded(
     const PaintInvalidationState& childPaintInvalidationState) {
   DCHECK(!RuntimeEnabledFeatures::slimmingPaintInvalidationEnabled());
 
   for (LayoutObject* child = slowFirstChild(); child;
        child = child->nextSibling()) {
     // Column spanners are invalidated through their placeholders. See
@@ skipping 2374 matching lines @@
     const blink::LayoutObject* root = object1;
     while (root->parent())
       root = root->parent();
     root->showLayoutTreeAndMark(object1, "*", object2, "-", 0);
   } else {
     WTFLogAlways("%s", "Cannot showLayoutTree. Root is (nil)");
   }
 }
 
 #endif