Don't use Error.toSafeString in List constructor.

sdk/lib/_internal/compiler/implementation/lib/js_helper.dart

Index: sdk/lib/_internal/compiler/implementation/lib/js_helper.dart
diff --git a/sdk/lib/_internal/compiler/implementation/lib/js_helper.dart b/sdk/lib/_internal/compiler/implementation/lib/js_helper.dart
index 57bf1e0f507403cbe624b168eca7d7564dd21385..fb84ae6540cf612b40447822621175210e3879c7 100644
--- a/sdk/lib/_internal/compiler/implementation/lib/js_helper.dart
+++ b/sdk/lib/_internal/compiler/implementation/lib/js_helper.dart
@@ -487,16 +487,10 @@ class Primitives {
   }
 
   static List newGrowableList(length) {
-    // TODO(sra): For good concrete type analysis we need the JS-type to
-    // specifically name the JavaScript Array implementation.  'List' matches
-    // all the dart:html types that implement List<T>.
     return JS('=List', r'new Array(#)', length);
   }
 
   static List newFixedList(length) {
-    // TODO(sra): For good concrete type analysis we need the JS-type to
-    // specifically name the JavaScript Array implementation.  'List' matches
-    // all the dart:html types that implement List<T>.
     var result = JS('=List', r'new Array(#)', length);
     JS('void', r'#.fixed$length = #', result, true);
     return result;