Update tests.

tests/compiler/dart2js/async_await_js_transform_test.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import "package:expect/expect.dart";
 import "package:compiler/src/js/js.dart";
 import "package:compiler/src/js/rewrite_async.dart";
 import "package:compiler/src/js_backend/js_backend.dart" show StringBackedName;
 
 void testTransform(String source, String expected, AsyncRewriterBase rewriter) {
@@ skipping 59 matching lines @@
         case 2:
           // returning from await.
           v0 = __result;
           v1 = 0;
           if (v1 < 0 || v1 >= v0.length)
             H.ioore(v0, v1);
           v2 = 4;
           v3 = 2;
           P.print(v0[v1].call$2(v2, v3));
           // implicit return
-          return thenHelper(null, 0, __completer, null);
+          return thenHelper(null, 0, __completer);
         case 1:
           // rethrow
           return thenHelper(__currentError, 1, __completer);
       }
   });
-  return thenHelper(null, body, __completer, null);
+  return thenHelper(null, body, __completer);
 }"""
   )  /// 01: ok
   ;
 
   testAsyncTransform("""
 function(a) async {
   print(this.x); // Ensure `this` is translated in the helper function.
   await foo();
 }""", """
 function(a) {
   var __goto = 0, __completer = new Completer(), __handler = 1, __currentError, __self = this;
   var body = _wrapJsFunctionForAsync(function(__errorCode, __result) {
     if (__errorCode === 1) {
       __currentError = __result;
       __goto = __handler;
     }
     while (true)
       switch (__goto) {
         case 0:
           // Function start
           print(__self.x);
           __goto = 2;
           return thenHelper(foo(), body, __completer);
         case 2:
           // returning from await.
           // implicit return
-          return thenHelper(null, 0, __completer, null);
+          return thenHelper(null, 0, __completer);
         case 1:
           // rethrow
           return thenHelper(__currentError, 1, __completer);
       }
   });
-  return thenHelper(null, body, __completer, null);
+  return thenHelper(null, body, __completer);
 }""");
 
   testAsyncTransform("""
   function(b) async {
     try {
       __outer: while (true) { // Overlapping label name.
         try {
           inner: while (true) {
             break __outer; // Break from untranslated loop to translated target.
             break; // break to untranslated target.
@@ skipping 97 matching lines @@
             __goto = __next.pop();
             break;
           case 5:
             // after finally
             __returnValue = 4;
             // goto return
             __goto = 1;
             break;
           case 1:
             // return
-            return thenHelper(__returnValue, 0, __completer, null);
+            return thenHelper(__returnValue, 0, __completer);
           case 2:
             // rethrow
             return thenHelper(__currentError, 1, __completer);
         }
   });
-  return thenHelper(null, body, __completer, null);
+  return thenHelper(null, body, __completer);
 }""");
 
   testAsyncTransform("""
 function(c) async {
   var a, b, c, d, e, f;
   a = b++; // post- and preincrements.
   b = --b;
   c = (await foo()).a++;
   d = ++(await foo()).a;
   e = foo1()[await foo2()]--;
@@ skipping 28 matching lines @@
         case 4:
           // returning from await.
           e = __temp1[__result]--;
           __temp1 = foo1();
           __goto = 5;
           return thenHelper(foo2(), body, __completer);
         case 5:
           // returning from await.
           f = --__temp1[__result];
           // implicit return
-          return thenHelper(null, 0, __completer, null);
+          return thenHelper(null, 0, __completer);
         case 1:
           // rethrow
           return thenHelper(__currentError, 1, __completer);
       }
   });
-  return thenHelper(null, body, __completer, null);
+  return thenHelper(null, body, __completer);
 }""");
 
   testAsyncTransform("""
   function(d2) async {
     var a, b, c, d, e, f, g, h; // empty initializer
     a = foo1() || await foo2(); // short circuiting operators
     b = await foo1() || foo2();
     c = await foo1() || foo3(await foo2());
     d = foo1() || foo2();
     e = foo1() && await foo2();
@@ skipping 106 matching lines @@
           // then
           __goto = 17;
           return thenHelper(foo2(), body, __completer);
         case 17:
           // returning from await.
         case 15:
           // join
           g = __result;
           h = foo1() && foo2();
           // implicit return
-          return thenHelper(null, 0, __completer, null);
+          return thenHelper(null, 0, __completer);
         case 1:
           // rethrow
           return thenHelper(__currentError, 1, __completer);
       }
   });
-  return thenHelper(null, body, __completer, null);
+  return thenHelper(null, body, __completer);
 }""");
 
   testAsyncTransform("""
 function(x, y) async {
   while (true) {
     switch(y) { // Switch with no awaits in case key expressions
       case 0:
       case 1: 
         await foo();
         continue; // Continue the loop, not the switch
@@ skipping 67 matching lines @@
           // case
           foo();
         case 5:
           // after switch
           // goto while condition
           __goto = 2;
           break;
         case 3:
           // after while
           // implicit return
-          return thenHelper(null, 0, __completer, null);
+          return thenHelper(null, 0, __completer);
         case 1:
           // rethrow
           return thenHelper(__currentError, 1, __completer);
       }
   });
-  return thenHelper(null, body, __completer, null);
+  return thenHelper(null, body, __completer);
 }""");
 
   testAsyncTransform("""
   function(f) async {
     do {
       var a = await foo();
       if (a) // If with no awaits in body
         break;
       else
         continue;
@@ skipping 34 matching lines @@
         case 6:
           // returning from await.
           if (__result) {
             // goto do body
             __goto = 2;
             break;
           }
         case 4:
           // after do
           // implicit return
-          return thenHelper(null, 0, __completer, null);
+          return thenHelper(null, 0, __completer);
         case 1:
           // rethrow
           return thenHelper(__currentError, 1, __completer);
       }
   });
-  return thenHelper(null, body, __completer, null);
+  return thenHelper(null, body, __completer);
 }""");
 
   testAsyncTransform("""
 function(g) async {
   for (var i = 0; i < await foo1(); i += await foo2()) {
     if (foo(i))
       continue;
     else
       break;
     if (!foo(i)) { // If with no else and await in body.
@@ skipping 63 matching lines @@
         case 11:
           // returning from await.
           i += __result;
           // goto for condition
           __goto = 3;
           break;
         case 5:
           // after for
         case 1:
           // return
-          return thenHelper(__returnValue, 0, __completer, null);
+          return thenHelper(__returnValue, 0, __completer);
         case 2:
           // rethrow
           return thenHelper(__currentError, 1, __completer);
       }
   });
-  return thenHelper(null, body, __completer, null);
+  return thenHelper(null, body, __completer);
 }""");
 
   testAsyncTransform("""
   function(a, h) async {
     var x = {"a": foo1(), "b": await foo2(), "c": foo3()};
     x["a"] = 2; // Different assignments
     (await foo()).a = 3;
     x[await foo()] = 4;
     x[(await foo1()).a = await foo2()] = 5;
     (await foo1())[await foo2()] = await foo3(6);
@@ skipping 48 matching lines @@
           return thenHelper(foo2(), body, __completer);
         case 8:
           // returning from await.
           __temp2 = __result;
           __goto = 9;
           return thenHelper(foo3(6), body, __completer);
         case 9:
           // returning from await.
           __temp1[__temp2] = __result;
           // implicit return
-          return thenHelper(null, 0, __completer, null);
+          return thenHelper(null, 0, __completer);
         case 1:
           // rethrow
           return thenHelper(__currentError, 1, __completer);
       }
   });
-  return thenHelper(null, body, __completer, null);
+  return thenHelper(null, body, __completer);
 }""");
 
   testAsyncTransform("""
 function(c, i) async {
   try {
     var x = c ? await foo() : foo(); // conditional
     var y = {};
   } catch (error) {
     try {
       x = c ? await fooError(error) : fooError(error);
@@ skipping 90 matching lines @@
           __goto = 5;
           break;
         case 2:
           // uncaught
           // goto rethrow
           __goto = 1;
           break;
         case 5:
           // after finally
           // implicit return
-          return thenHelper(null, 0, __completer, null);
+          return thenHelper(null, 0, __completer);
         case 1:
           // rethrow
           return thenHelper(__currentError, 1, __completer);
       }
   });
-  return thenHelper(null, body, __completer, null);
+  return thenHelper(null, body, __completer);
 }""");
 
   testAsyncTransform("""
   function(x, y, j) async {
     print(await(foo(x))); // calls
     (await print)(foo(x));
     print(foo(await x));
     await (print(foo(await x)));
     print(foo(x, await y, z));
   }
@@ skipping 39 matching lines @@
           // returning from await.
           __temp1 = print;
           __temp2 = foo;
           __temp3 = x;
           __goto = 7;
           return thenHelper(y, body, __completer);
         case 7:
           // returning from await.
           __temp1(__temp2(__temp3, __result, z));
           // implicit return
-          return thenHelper(null, 0, __completer, null);
+          return thenHelper(null, 0, __completer);
         case 1:
           // rethrow
           return thenHelper(__currentError, 1, __completer);
       }
   });
-  return thenHelper(null, body, __completer, null);
+  return thenHelper(null, body, __completer);
 }""");
 
   testAsyncTransform("""
 function(x, y, k) async {
   while (await(foo())) {
     lab: { // labelled statement
       switch(y) {
       case 0:
         foo();
       case 0: // Duplicate case
@@ skipping 113 matching lines @@
           foo();
         case 6:
           // break lab
           // goto while condition
           __goto = 3;
           break;
         case 4:
           // after while
         case 1:
           // return
-          return thenHelper(__returnValue, 0, __completer, null);
+          return thenHelper(__returnValue, 0, __completer);
         case 2:
           // rethrow
           return thenHelper(__currentError, 1, __completer);
       }
   });
-  return thenHelper(null, body, __completer, null);
+  return thenHelper(null, body, __completer);
 }""");
 
   testAsyncTransform("""
   function(l) async {
     switch(await l) {
       case 1:
         print(1);
         break;
       case 2:
         print(1);
@@ skipping 22 matching lines @@
             case 1:
               print(1);
               break;
             case 2:
               print(1);
             default:
               print(2);
               break;
           }
           // implicit return
-          return thenHelper(null, 0, __completer, null);
+          return thenHelper(null, 0, __completer);
         case 1:
           // rethrow
           return thenHelper(__currentError, 1, __completer);
       }
   });
-  return thenHelper(null, body, __completer, null);
+  return thenHelper(null, body, __completer);
 }""");
 
   testAsyncTransform("""
   function(m) async {
     var exception = 1;
     try {
       await 42;
       throw 42;
     } catch (exception) {
       exception = await 10;
@@ skipping 52 matching lines @@
           break;
         case 2:
           // uncaught
           // goto rethrow
           __goto = 1;
           break;
         case 5:
           // after finally
           print(exception);
           // implicit return
-          return thenHelper(null, 0, __completer, null);
+          return thenHelper(null, 0, __completer);
         case 1:
           // rethrow
           return thenHelper(__currentError, 1, __completer);
       }
   });
-  return thenHelper(null, body, __completer, null);
+  return thenHelper(null, body, __completer);
 }""");
 
   testSyncStarTransform("""
 function(a) sync* {
   // Ensure that return of a value is treated as first evaluating the value, and
   // then returning.
   return foo();
 }""", """
 function(__a) {
   return new newIterable(function() {
@@ skipping 16 matching lines @@
             // return
             return endOfIteration();
           case 2:
             // rethrow
             return uncaughtError(__currentError);
         }
     };
   });
 }""");
 }