Fire attributeChangedCallback on style changes for Custom Elements V1

third_party/WebKit/Source/core/dom/custom/CustomElementDefinition.h

Index: third_party/WebKit/Source/core/dom/custom/CustomElementDefinition.h
diff --git a/third_party/WebKit/Source/core/dom/custom/CustomElementDefinition.h b/third_party/WebKit/Source/core/dom/custom/CustomElementDefinition.h
index a1db45a656006e5d441650bb343a64453220c122..eead3c526ef6c9cdb136eb53e4e43876400735aa 100644
--- a/third_party/WebKit/Source/core/dom/custom/CustomElementDefinition.h
+++ b/third_party/WebKit/Source/core/dom/custom/CustomElementDefinition.h
@@ -56,7 +56,8 @@ public:
 
     virtual bool hasConnectedCallback() const = 0;
     virtual bool hasDisconnectedCallback() const = 0;
-    bool hasAttributeChangedCallback(const QualifiedName&);
+    bool hasAttributeChangedCallback(const QualifiedName&) const;
+    bool hasStyleAttributeChangedCallback() const;
 
     virtual void runConnectedCallback(Element*) = 0;
     virtual void runDisconnectedCallback(Element*) = 0;
@@ -74,11 +75,11 @@ protected:
 
     static void checkConstructorResult(Element*, Document&, const QualifiedName&, ExceptionState&);
 
-    HashSet<AtomicString> m_observedAttributes;
-
 private:
     const CustomElementDescriptor m_descriptor;
     ConstructionStack m_constructionStack;
+    HashSet<AtomicString> m_observedAttributes;
+    bool m_hasStyleAttributeChangedCallback;
 
     void enqueueAttributeChangedCallbackForAllAttributes(Element*);
 };