Added tests for missing 'this' property accesses.

tests/cases/fourslash/codeFixAddForgottenThis01.ts

@@ -0,0 +1,10 @@
+/// <reference path='fourslash.ts' />
+
+////class C {
+////    foo: number;
+////    constructor() {
+////        [|foo = 10|];
+////    }
+////}
+
+verify.rangeAfterCodeFix("this.foo = 10");

tests/cases/fourslash/codeFixAddForgottenThis02.ts

@@ -0,0 +1,9 @@
+/// <reference path='fourslash.ts' />
+
+////class C {
+////    constructor(public foo) {
+////    }
+////    bar() { [|foo = 10|] };
+////}
+
+verify.rangeAfterCodeFix("this.foo = 10");