Fix duplicate function declarations (#905)

Fixes #771

test/language/expressions/delete/S11.4.1_A3.1.js

@@ -27,13 +27,7 @@ if (delete MyFunction !== false) {
 }
 
 //CHECK#4
-function MyFunction(){};
 var MyObject = new MyFunction();
 if (delete MyObject !== false) {
   $ERROR('#4: function MyFunction(){}; var MyObject = new MyFunction(); delete MyObject === false');
 }
-
-//CHECK#5
-if (delete MyObject !== false) {
-  $ERROR('#5: function MyFunction(){}; var MyObject = new MyFunction(); delete MyObject === false');
-}

test/language/expressions/this/S11.1.1_A3.1.js

@@ -11,13 +11,13 @@ flags: [noStrict]
 ---*/
 
 //CHECK#1
-function MyFunction() {return this}
-if (MyFunction() !== this) {
-  $ERROR('#1: function MyFunction() {return this} MyFunction() === this. Actual: ' + (MyFunction()));
+function ReturnThis() {return this}
+if (ReturnThis() !== this) {
+  $ERROR('#1: function ReturnThis() {return this} ReturnThis() === this. Actual: ' + (ReturnThis()));
 }
 
 //CHECK#2
-function MyFunction() {return eval("this")}
-if (MyFunction() !== this) {
-  $ERROR('#2: function MyFunction() {return eval("this")} MyFunction() === this. Actual: ' + (MyFunction()));
+function ReturnEvalThis() {return eval("this")}
+if (ReturnEvalThis() !== this) {
+  $ERROR('#2: function ReturnEvalThis() {return eval("this")} ReturnEvalThis() === this. Actual: ' + (ReturnEvalThis()));
 }

test/language/expressions/this/S11.1.1_A3.2.js

@@ -11,13 +11,13 @@ flags: [noStrict]
 ---*/
 
 //CHECK#1
-function MyFunction() {this.THIS = this}
-if ((new MyFunction()).THIS.toString() !== "[object Object]") {
-  $ERROR('#1: function MyFunction() {this.THIS = this} (new MyFunction()).THIS.toString() !== "[object Object]". Actual: ' + ((new MyFunction()).THIS.toString()));
+function SetThis() {this.THIS = this}
+if ((new SetThis()).THIS.toString() !== "[object Object]") {
+  $ERROR('#1: function SetThis() {this.THIS = this} (new SetThis()).THIS.toString() !== "[object Object]". Actual: ' + ((new SetThis()).THIS.toString()));
 }
 
 //CHECK#2
-function MyFunction() {this.THIS = eval("this")}
-if ((new MyFunction()).THIS.toString() !== "[object Object]") {
-  $ERROR('#2: function MyFunction() {this.THIS = eval("this")} (new MyFunction()).THIS.toString() !== "[object Object]". Actual: ' + ((new MyFunction()).THIS.toString()));
+function SetEvalThis() {this.THIS = eval("this")}
+if ((new SetEvalThis()).THIS.toString() !== "[object Object]") {
+  $ERROR('#2: function SetEvalThis() {this.THIS = eval("this")} (new SetEvalThis()).THIS.toString() !== "[object Object]". Actual: ' + ((new SetEvalThis()).THIS.toString()));
 }