Partial implementation of inline StylePropertyMap.

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

Index: third_party/WebKit/Source/core/css/cssom/StylePropertyMap.h
diff --git a/third_party/WebKit/Source/core/css/cssom/StylePropertyMap.h b/third_party/WebKit/Source/core/css/cssom/StylePropertyMap.h
index 79b873e652ccef8d387c9945d0ac27037f07bc1b..6b3bffbad6e91e2cb6e5e3e7f2a74c367a479789 100644
--- a/third_party/WebKit/Source/core/css/cssom/StylePropertyMap.h
+++ b/third_party/WebKit/Source/core/css/cssom/StylePropertyMap.h
@@ -23,9 +23,9 @@ public:
     virtual ~StylePropertyMap() { }
 
     // Accessors.
-    StyleValue* get(const String& propertyName);
-    HeapVector<Member<StyleValue>> getAll(const String& propertyName);
-    bool has(const String& propertyName);
+    StyleValue* get(const String& propertyName, ExceptionState&);
+    HeapVector<Member<StyleValue>> getAll(const String& propertyName, ExceptionState&);
+    bool has(const String& propertyName, ExceptionState&);
 
     virtual StyleValue* get(CSSPropertyID) = 0;
     virtual HeapVector<Member<StyleValue>> getAll(CSSPropertyID) = 0;
@@ -46,6 +46,8 @@ public:
 
 protected:
     StylePropertyMap() { }
+
+    IterationSource* startIteration(ScriptState*, ExceptionState&) override { return nullptr; }
 };
 
 } // namespace blink