Fix for bug 1019276: Extra set of parenthesis added when simplifying type name

Handle the trivial case of ((x)) -> (x) when only the inner parenthesized expression has Simplifier annotation. (changeset 1329157)

Src/Workspaces/CSharp/Extensions/ParenthesizedExpressionSyntaxExtensions.cs

@@ -13,7 +13,8 @@ public static bool CanRemoveParentheses(this ParenthesizedExpressionSyntax node)
 
             // Simplest cases:
             //   ((x)) -> (x)
-            if (expression.IsKind(SyntaxKind.ParenthesizedExpression))
+            if (expression.IsKind(SyntaxKind.ParenthesizedExpression) ||
+                parentExpression.IsKind(SyntaxKind.ParenthesizedExpression))
             {
                 return true;
             }