Use more js templates in async rewrite.

tests/compiler/dart2js/async_await_js_transform_test.dart

Index: tests/compiler/dart2js/async_await_js_transform_test.dart
diff --git a/tests/compiler/dart2js/async_await_js_transform_test.dart b/tests/compiler/dart2js/async_await_js_transform_test.dart
index 72c6c09a3e28f311004d26cf270814dd4bdc7245..e15a4ba1c61bd42d5f971ba36a0bdee5b53fcbda 100644
--- a/tests/compiler/dart2js/async_await_js_transform_test.dart
+++ b/tests/compiler/dart2js/async_await_js_transform_test.dart
@@ -36,7 +36,7 @@ function(a) async {
 function(a) {
   var __goto = 0, __completer = new Completer(), __handler = 1, __currentError, __self = this;
   function __body(__errorCode, __result) {
-    if (__errorCode == 1) {
+    if (__errorCode === 1) {
       __currentError = __result;
       __goto = __handler;
     }
@@ -86,7 +86,7 @@ function(a) {
 function(b) {
   var __goto = 0, __completer = new Completer(), __handler = 2, __currentError, __next, __returnValue, __helper;
   function __body(__errorCode, __result) {
-    if (__errorCode == 1) {
+    if (__errorCode === 1) {
       __currentError = __result;
       __goto = __handler;
     }
@@ -198,7 +198,7 @@ function(c) async {
 function(c) {
   var __goto = 0, __completer = new Completer(), __handler = 1, __currentError, a, b, c, d, e, f, __temp1;
   function __body(__errorCode, __result) {
-    if (__errorCode == 1) {
+    if (__errorCode === 1) {
       __currentError = __result;
       __goto = __handler;
     }
@@ -255,7 +255,7 @@ function(c) {
 function(d2) {
   var __goto = 0, __completer = new Completer(), __handler = 1, __currentError, a, b, c, d, e, f, g, h, __temp1;
   function __body(__errorCode, __result) {
-    if (__errorCode == 1) {
+    if (__errorCode === 1) {
       __currentError = __result;
       __goto = __handler;
     }
@@ -392,7 +392,7 @@ function(x, y) async {
 function(x, y) {
   var __goto = 0, __completer = new Completer(), __handler = 1, __currentError;
   function __body(__errorCode, __result) {
-    if (__errorCode == 1) {
+    if (__errorCode === 1) {
       __currentError = __result;
       __goto = __handler;
     }
@@ -479,7 +479,7 @@ function(x, y) {
 function(f) {
   var __goto = 0, __completer = new Completer(), __handler = 1, __currentError, a;
   function __body(__errorCode, __result) {
-    if (__errorCode == 1) {
+    if (__errorCode === 1) {
       __currentError = __result;
       __goto = __handler;
     }
@@ -544,7 +544,7 @@ function(g) async {
 function(g) {
   var __goto = 0, __completer = new Completer(), __handler = 2, __currentError, __returnValue, i, __temp1;
   function __body(__errorCode, __result) {
-    if (__errorCode == 1) {
+    if (__errorCode === 1) {
       __currentError = __result;
       __goto = __handler;
     }
@@ -629,7 +629,7 @@ function(g) {
 function(a, h) {
   var __goto = 0, __completer = new Completer(), __handler = 1, __currentError, x, __temp1, __temp2;
   function __body(__errorCode, __result) {
-    if (__errorCode == 1) {
+    if (__errorCode === 1) {
       __currentError = __result;
       __goto = __handler;
     }
@@ -710,7 +710,7 @@ function(c, i) async {
 function(c, i) {
   var __goto = 0, __completer = new Completer(), __handler = 1, __currentError, x, y, __error1, __error2;
   function __body(__errorCode, __result) {
-    if (__errorCode == 1) {
+    if (__errorCode === 1) {
       __currentError = __result;
       __goto = __handler;
     }
@@ -820,7 +820,7 @@ function(c, i) {
 function(x, y, j) {
   var __goto = 0, __completer = new Completer(), __handler = 1, __currentError, __temp1, __temp2, __temp3;
   function __body(__errorCode, __result) {
-    if (__errorCode == 1) {
+    if (__errorCode === 1) {
       __currentError = __result;
       __goto = __handler;
     }
@@ -903,7 +903,7 @@ function(x, y, k) async {
 function(x, y, k) {
   var __goto = 0, __completer = new Completer(), __handler = 2, __currentError, __returnValue, __temp1;
   function __body(__errorCode, __result) {
-    if (__errorCode == 1) {
+    if (__errorCode === 1) {
       __currentError = __result;
       __goto = __handler;
     }