[Experimental] Implement some part of custom properties in style maps

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

Index: third_party/WebKit/Source/core/css/cssom/StylePropertyMap.cpp
diff --git a/third_party/WebKit/Source/core/css/cssom/StylePropertyMap.cpp b/third_party/WebKit/Source/core/css/cssom/StylePropertyMap.cpp
index 4e56ef6b250774a22471ecd668928a39b76a75f5..6613ef05e68f257ac43d6410604a90aadf58718b 100644
--- a/third_party/WebKit/Source/core/css/cssom/StylePropertyMap.cpp
+++ b/third_party/WebKit/Source/core/css/cssom/StylePropertyMap.cpp
@@ -68,12 +68,15 @@ CSSStyleValue* StylePropertyMap::get(const String& propertyName,
 CSSStyleValueVector StylePropertyMap::getAll(const String& propertyName,
                                              ExceptionState& exceptionState) {
   CSSPropertyID propertyID = cssPropertyID(propertyName);
-  if (propertyID != CSSPropertyInvalid && propertyID != CSSPropertyVariable)
-    return getAllInternal(propertyID);
+  if (propertyID == CSSPropertyInvalid) {
+    exceptionState.throwTypeError("Invalid propertyName: " + propertyName);
+    return CSSStyleValueVector();
+  }
 
-  // TODO(meade): Handle custom properties here.
-  exceptionState.throwTypeError("Invalid propertyName: " + propertyName);
-  return CSSStyleValueVector();
+  if (propertyID == CSSPropertyVariable)
+    return getAllInternal(propertyName);
+
+  return getAllInternal(propertyID);
 }
 
 bool StylePropertyMap::has(const String& propertyName,