Rename ExceptionCode constants to use the names in the spec (2/3)

Source/core/dom/DatasetDOMStringMap.cpp

Index: Source/core/dom/DatasetDOMStringMap.cpp
diff --git a/Source/core/dom/DatasetDOMStringMap.cpp b/Source/core/dom/DatasetDOMStringMap.cpp
index d1db9f173bb03890b0f174977508d65863ddf986..30a11c8cfc47c32b9d719821efebbb38ab50a855 100644
--- a/Source/core/dom/DatasetDOMStringMap.cpp
+++ b/Source/core/dom/DatasetDOMStringMap.cpp
@@ -179,7 +179,7 @@ bool DatasetDOMStringMap::contains(const String& name)
 void DatasetDOMStringMap::setItem(const String& name, const String& value, ExceptionCode& ec)
 {
     if (!isValidPropertyName(name)) {
-        ec = SYNTAX_ERR;
+        ec = SyntaxError;
         return;
     }
 
@@ -189,7 +189,7 @@ void DatasetDOMStringMap::setItem(const String& name, const String& value, Excep
 void DatasetDOMStringMap::deleteItem(const String& name, ExceptionCode& ec)
 {
     if (!isValidPropertyName(name)) {
-        ec = SYNTAX_ERR;
+        ec = SyntaxError;
         return;
     }