Represent implicit 'this' binding by 'super' in AST.

test/mjsunit/harmony/super.js

Index: test/mjsunit/harmony/super.js
diff --git a/test/mjsunit/harmony/super.js b/test/mjsunit/harmony/super.js
index 270c159e80b22a1c9b1389e76d8d1262068205c2..ab572b056f262e39dcf522d090cc9667c19309dd 100644
--- a/test/mjsunit/harmony/super.js
+++ b/test/mjsunit/harmony/super.js
@@ -1979,7 +1979,8 @@ TestKeyedSetterCreatingOwnPropertiesNonConfigurable(42, 43, 44);
 
   class Derived extends Base {
     constructor() {
-      super();
+      let r = super();
+      assertEquals(this, r);
       derivedCalled++;
     }
   }
@@ -1995,7 +1996,8 @@ TestKeyedSetterCreatingOwnPropertiesNonConfigurable(42, 43, 44);
 
   class DerivedDerived extends Derived {
     constructor() {
-      super();
+      let r = super();
+      assertEquals(this, r);
       derivedDerivedCalled++;
     }
   }
@@ -2015,7 +2017,8 @@ TestKeyedSetterCreatingOwnPropertiesNonConfigurable(42, 43, 44);
   }
   class Derived2 extends Base2 {
     constructor(v1, v2) {
-      super(v1);
+      let r = super(v1);
+      assertEquals(this, r);
       this.fromDerived = v2;
     }
   }
@@ -2128,7 +2131,8 @@ TestKeyedSetterCreatingOwnPropertiesNonConfigurable(42, 43, 44);
   }
   class Derived extends Base {
     constructor(x) {
-      eval('super(x)');
+      let r = eval('super(x)');
+      assertEquals(this, r);
     }
   }
   let d = new Derived(42);
@@ -2145,7 +2149,8 @@ TestKeyedSetterCreatingOwnPropertiesNonConfigurable(42, 43, 44);
   }
   class Derived extends Base {
     constructor(x) {
-      (() => super(x))();
+      let r = (() => super(x))();
+      assertEquals(this, r);
     }
   }
   let d = new Derived(42);
@@ -2231,7 +2236,8 @@ TestKeyedSetterCreatingOwnPropertiesNonConfigurable(42, 43, 44);
   }
   class Derived extends Base {
     constructor(x) {
-      eval('super(...[x])');
+      let r = eval('super(...[x])');
+      assertEquals(this, r);
     }
   }
   let d = new Derived(42);
@@ -2248,7 +2254,8 @@ TestKeyedSetterCreatingOwnPropertiesNonConfigurable(42, 43, 44);
   }
   class Derived extends Base {
     constructor(x) {
-      (() => super(...[x]))();
+      let r = (() => super(...[x]))();
+      assertEquals(this, r);
     }
   }
   let d = new Derived(42);