Track reasons for |Node::SetNeedsStyleRecalc|

Source/core/dom/Document.cpp

Index: Source/core/dom/Document.cpp
diff --git a/Source/core/dom/Document.cpp b/Source/core/dom/Document.cpp
index f4b33bdbf979b63655eae795cbfd430c283a84a7..c9261e07aac15f1ec7de8a190da2e39d0c982cd9 100644
--- a/Source/core/dom/Document.cpp
+++ b/Source/core/dom/Document.cpp
@@ -1204,7 +1204,7 @@ void Document::setContentLanguage(const AtomicString& language)
     m_contentLanguage = language;
 
     // Document's style depends on the content language.
-    setNeedsStyleRecalc(SubtreeStyleChange);
+    setNeedsStyleRecalc(StyleChangeReasonForTracing::Language, SubtreeStyleChange);
 }
 
 void Document::setXMLVersion(const String& version, ExceptionState& exceptionState)
@@ -1735,7 +1735,7 @@ void Document::inheritHtmlAndBodyElementStyles(StyleRecalcChange change)
     // rare and just invalidate the cache for now.
     if (styleEngine()->usesRemUnits() && (documentElement()->needsAttach() || documentElement()->computedStyle()->fontSize() != documentElementStyle->fontSize())) {
         ensureStyleResolver().invalidateMatchedPropertiesCache();
-        documentElement()->setNeedsStyleRecalc(SubtreeStyleChange);
+        documentElement()->setNeedsStyleRecalc(StyleChangeReasonForTracing::FontSizeChange, SubtreeStyleChange);
     }
 
     EOverflow overflowX = OAUTO;
@@ -1773,13 +1773,13 @@ void Document::inheritHtmlAndBodyElementStyles(StyleRecalcChange change)
     if (body) {
         if (RenderStyle* style = body->renderStyle()) {
             if (style->direction() != rootDirection || style->writingMode() != rootWritingMode)
-                body->setNeedsStyleRecalc(SubtreeStyleChange);
+                body->setNeedsStyleRecalc(StyleChangeReasonForTracing::WritingModeChange, SubtreeStyleChange);
         }
     }
 
     if (RenderStyle* style = documentElement()->renderStyle()) {
         if (style->direction() != rootDirection || style->writingMode() != rootWritingMode)
-            documentElement()->setNeedsStyleRecalc(SubtreeStyleChange);
+            documentElement()->setNeedsStyleRecalc(StyleChangeReasonForTracing::WritingModeChange, SubtreeStyleChange);
     }
 }
 
@@ -1962,7 +1962,7 @@ void Document::updateLayout()
 
 void Document::setNeedsFocusedElementCheck()
 {
-    setNeedsStyleRecalc(LocalStyleChange);
+    setNeedsStyleRecalc(StyleChangeReasonForTracing::FocusPseudoClass, LocalStyleChange);
 }
 
 void Document::clearFocusedElementSoon()
@@ -2088,7 +2088,7 @@ bool Document::dirtyElementsForLayerUpdate()
         return false;
 
     for (WillBeHeapHashSet<RawPtrWillBeMember<Element> >::iterator it = m_layerUpdateSVGFilterElements.begin(), end = m_layerUpdateSVGFilterElements.end(); it != end; ++it)
-        (*it)->setNeedsStyleRecalc(LocalStyleChange);
+        (*it)->setNeedsStyleRecalc(StyleChangeReasonForTracing::SVGFilterLayerUpdate, LocalStyleChange);
     m_layerUpdateSVGFilterElements.clear();
     return true;
 }
@@ -4314,7 +4314,7 @@ void Document::setEncodingData(const DocumentEncodingData& newData)
         // FIXME: How is possible to not have a renderer here?
         if (renderView())
             renderView()->style()->setRTLOrdering(m_visuallyOrdered ? VisualOrder : LogicalOrder);
-        setNeedsStyleRecalc(SubtreeStyleChange);
+        setNeedsStyleRecalc(StyleChangeReasonForTracing::VisuallyOrdered, SubtreeStyleChange);
     }
 }
 
@@ -4476,7 +4476,7 @@ void Document::setDesignMode(InheritedBool value)
             continue;
         if (!toLocalFrame(frame)->document())
             break;
-        toLocalFrame(frame)->document()->setNeedsStyleRecalc(SubtreeStyleChange);
+        toLocalFrame(frame)->document()->setNeedsStyleRecalc(StyleChangeReasonForTracing::DesignMode, SubtreeStyleChange);
     }
 }