Implement iterable<DOMString, (StyleValue or sequence<StyleValue>)> for InlineStylePropertyMap

third_party/WebKit/Source/core/css/cssom/InlineStylePropertyMap.h

Index: third_party/WebKit/Source/core/css/cssom/InlineStylePropertyMap.h
diff --git a/third_party/WebKit/Source/core/css/cssom/InlineStylePropertyMap.h b/third_party/WebKit/Source/core/css/cssom/InlineStylePropertyMap.h
index 74f2f7c5de05a6b76c175221854537a3ff77fa77..8bf6c2da0749720bf62570d3a90c7f8e2f743adf 100644
--- a/third_party/WebKit/Source/core/css/cssom/InlineStylePropertyMap.h
+++ b/third_party/WebKit/Source/core/css/cssom/InlineStylePropertyMap.h
@@ -30,6 +30,9 @@ public:
         MutableStylePropertyMap::trace(visitor);
     }
 
+protected:
+    HeapVector<StylePropertyMapEntry> getIterationEntries() override;
+
 private:
     Member<Element> m_ownerElement;
 };