Fix CSSPropertySetterGetterMethods regression

third_party/WebKit/Source/core/inspector/InspectorCSSAgent.cpp

Index: third_party/WebKit/Source/core/inspector/InspectorCSSAgent.cpp
diff --git a/third_party/WebKit/Source/core/inspector/InspectorCSSAgent.cpp b/third_party/WebKit/Source/core/inspector/InspectorCSSAgent.cpp
index 4a33eb8f9fd3c3681f191a87f324661d38987007..7d71f1b9105d8de85a088945826cb2b7e214565c 100644
--- a/third_party/WebKit/Source/core/inspector/InspectorCSSAgent.cpp
+++ b/third_party/WebKit/Source/core/inspector/InspectorCSSAgent.cpp
@@ -117,8 +117,8 @@ String createShorthandValue(Document* document,
   CSSStyleRule* rule = toCSSStyleRule(styleSheet->item(0));
   CSSStyleDeclaration* style = rule->style();
   DummyExceptionStateForTesting exceptionState;
-  style->setProperty(nullptr, longhand, newValue,
-                     style->getPropertyPriority(longhand), exceptionState);
+  style->setProperty(longhand, newValue, style->getPropertyPriority(longhand),
+                     exceptionState);
   return style->getPropertyValue(shorthand);
 }