Track reasons for |Node::SetNeedsStyleRecalc|

Source/core/dom/shadow/InsertionPoint.cpp

Index: Source/core/dom/shadow/InsertionPoint.cpp
diff --git a/Source/core/dom/shadow/InsertionPoint.cpp b/Source/core/dom/shadow/InsertionPoint.cpp
index fb1029415a385788b478bfd5a132380aac8fae29..a7be69d6dd1bb1e78a23c27b205f4497fa8e8775 100644
--- a/Source/core/dom/shadow/InsertionPoint.cpp
+++ b/Source/core/dom/shadow/InsertionPoint.cpp
@@ -123,7 +123,7 @@ void InsertionPoint::willRecalcStyle(StyleRecalcChange change)
     if (change < Inherit)
         return;
     for (size_t i = 0; i < m_distribution.size(); ++i)
-        m_distribution.at(i)->setNeedsStyleRecalc(SubtreeStyleChange);
+        m_distribution.at(i)->setNeedsStyleRecalc(StyleChangeReasonForTracing::Shadow, SubtreeStyleChange);

[esprehn, 2014/09/19 04:53:09]

This is going to confuse people, this happens inside recalcStyle we're
scheduling a recalc to propagate the Inherit change to the distributed nodes.
It's not related to shadows at all, the user already caused a huge recalc by
causing an inherit change (ex. changing color) so it's not clear what this
record will tell them, especially since it came out of the inside of recalc
style.

[kouhei (in TOK), 2014/09/22 09:03:54]

Done.

 }
 
 bool InsertionPoint::shouldUseFallbackElements() const