[Typed CSSOM] Get computed values for custom properties

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

Index: third_party/WebKit/Source/core/css/cssom/InlineStylePropertyMap.cpp
diff --git a/third_party/WebKit/Source/core/css/cssom/InlineStylePropertyMap.cpp b/third_party/WebKit/Source/core/css/cssom/InlineStylePropertyMap.cpp
index edcc24f27a5ad1b347a3db02bbcf382fcdc0a92e..0016c5c10b3317f203be4f3b0fc8d897aa1be559 100644
--- a/third_party/WebKit/Source/core/css/cssom/InlineStylePropertyMap.cpp
+++ b/third_party/WebKit/Source/core/css/cssom/InlineStylePropertyMap.cpp
@@ -72,15 +72,11 @@ CSSStyleValueVector InlineStylePropertyMap::getAllInternal(
 }
 
 CSSStyleValueVector InlineStylePropertyMap::getAllInternal(
-    AtomicString customPropertyName) {
-  const CSSValue* cssValue =
-      m_ownerElement->ensureMutableInlineStyle().getPropertyCSSValue(
-          customPropertyName);
-  if (!cssValue)
-    return CSSStyleValueVector();
-
-  return StyleValueFactory::cssValueToStyleValueVector(CSSPropertyInvalid,
-                                                       *cssValue);
+    AtomicString customPropertyName,
+    ExceptionState& exceptionState) {
+  // TODO(rjwright/meade): Handle custom properties.
+  exceptionState.throwTypeError("Invalid propertyName: " + customPropertyName);
+  return CSSStyleValueVector();
 }
 
 Vector<String> InlineStylePropertyMap::getProperties() {