SyntaxTreeExtensions.IsNameOfContext is missing some cases, which causes rename to introduce errors #1439

class Program
{
    int field;

    static void Main(string[] args)
    {
        // Rename "local" to "field"
        int local;

        var x = nameof(field); // Correctly expands to Program.field
        nameof(field).ToString(); // Should also expand to Program.field
    }
}

class Program
{
    int field;

    static void Main(string[] args)
    {
        // Rename "local" to "field"
        int field;

        var x = nameof(Program.field); // Correctly expands to Program.field
        nameof(Program.field).ToString(); // Should also expand to Program.field
    }
}

class Program
{
    int field;

    static void Main(string[] args)
    {
        // Rename "local" to "field"
        int field;

        var x = nameof(Program.field); // Correctly expands to Program.field
        nameof(this.field).ToString(); // Should also expand to Program.field
    }
}