Track reasons for |Node::SetNeedsStyleRecalc|

Source/core/page/Page.cpp

Index: Source/core/page/Page.cpp
diff --git a/Source/core/page/Page.cpp b/Source/core/page/Page.cpp
index e91c6bf5e24f99484e235c5edf1aeea8b94f0937..c6d405314c8d568afdc868a30ba33f985c592869 100644
--- a/Source/core/page/Page.cpp
+++ b/Source/core/page/Page.cpp
@@ -234,7 +234,7 @@ void Page::scheduleForcedStyleRecalcForAllPages()
     for (HashSet<Page*>::iterator it = allPages().begin(); it != end; ++it)
         for (Frame* frame = (*it)->mainFrame(); frame; frame = frame->tree().traverseNext()) {
             if (frame->isLocalFrame())
-                toLocalFrame(frame)->document()->setNeedsStyleRecalc(SubtreeStyleChange);
+                toLocalFrame(frame)->document()->setNeedsStyleRecalc(StyleChangeReasonForTracing::create(StyleChangeReason::PlatformColorChange), SubtreeStyleChange);
         }
 }