Address code review

Author: Yui T

src/compiler/checker.ts

@@ -11444,19 +11444,17 @@ namespace ts {
             forEach(node.declarationList.declarations, checkSourceElement);
         }
 
-        function checkGrammarDisallowedModifiersOnMethodInObjectLiteralExpression(node: Node) {
-            if (node.modifiers) {
-                if (node.parent.kind === SyntaxKind.ObjectLiteralExpression){
-                    // If this method declaration is a property of object-literal-expression
-                    if (isAsyncFunctionLike(node)) {
-                        if (node.modifiers.length > 1) {
-                            return grammarErrorOnFirstToken(node, Diagnostics.Modifiers_cannot_appear_here); 
-                        }
-                    }
-                    else {
+        function checkGrammarDisallowedModifiersOnObjectLiteralExpressionMethod(node: Node) {
+            // We only disallow modifier on a method declaration if it is a property of object-literal-expression
+            if (node.modifiers && node.parent.kind === SyntaxKind.ObjectLiteralExpression){
+                if (isAsyncFunctionLike(node)) {
+                    if (node.modifiers.length > 1) {
                         return grammarErrorOnFirstToken(node, Diagnostics.Modifiers_cannot_appear_here);
                     }
                 }
+                else {
+                    return grammarErrorOnFirstToken(node, Diagnostics.Modifiers_cannot_appear_here);
+                }
             }
         }
 
@@ -15015,7 +15013,7 @@ namespace ts {
         }
 
         function checkGrammarMethod(node: MethodDeclaration) {
-            if (checkGrammarDisallowedModifiersOnMethodInObjectLiteralExpression(node) ||
+            if (checkGrammarDisallowedModifiersOnObjectLiteralExpressionMethod(node) ||
                 checkGrammarFunctionLikeDeclaration(node) ||
                 checkGrammarForGenerator(node)) {
                 return true;