Fix LayoutObject::SetSubtreeNeedsPaintPropertyUpdate() to set ancestor flags

third_party/WebKit/Source/core/dom/DocumentLifecycle.cpp

Index: third_party/WebKit/Source/core/dom/DocumentLifecycle.cpp
diff --git a/third_party/WebKit/Source/core/dom/DocumentLifecycle.cpp b/third_party/WebKit/Source/core/dom/DocumentLifecycle.cpp
index c66e3fbe32ca53671bfd1b82014d29a63f25bfca..eb950da5423183a5c857fe1c6173da3fe03208cb 100644
--- a/third_party/WebKit/Source/core/dom/DocumentLifecycle.cpp
+++ b/third_party/WebKit/Source/core/dom/DocumentLifecycle.cpp
@@ -265,7 +265,7 @@ bool DocumentLifecycle::CanAdvanceTo(LifecycleState next_state) const {
       if (!RuntimeEnabledFeatures::slimmingPaintV2Enabled() &&
           next_state == kInCompositingUpdate)
         return true;
-      if (RuntimeEnabledFeatures::slimmingPaintV2Enabled() &&
+      if (RuntimeEnabledFeatures::slimmingPaintInvalidationEnabled() &&

[Xianzhu, 2017/04/20 21:01:13]

This is for the test to work.

This also makes transition of kInPrePaint consistent with other transitions: we
allow entering a previous kInXXX state from a later clean state. The transition
happens in tests though, because we always start from the kInStyleRecalc for
lifecycle updates in non-testing code. 

           next_state == kInPrePaint)
         return true;
       break;
@@ -281,7 +281,7 @@ bool DocumentLifecycle::CanAdvanceTo(LifecycleState next_state) const {
       if (!RuntimeEnabledFeatures::slimmingPaintV2Enabled() &&
           next_state == kInCompositingUpdate)
         return true;
-      if (RuntimeEnabledFeatures::slimmingPaintV2Enabled() &&
+      if (RuntimeEnabledFeatures::slimmingPaintInvalidationEnabled() &&
           next_state == kInPrePaint)
         return true;
       break;