Change === to identical in the dart2js source.

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

Index: sdk/lib/_internal/compiler/implementation/constants.dart
diff --git a/sdk/lib/_internal/compiler/implementation/constants.dart b/sdk/lib/_internal/compiler/implementation/constants.dart
index 880149bc03df0986ae918a3aa62c1cbc474736bc..ad5dc74d65768e153951eb5c5dc4b25063b5b007 100644
--- a/sdk/lib/_internal/compiler/implementation/constants.dart
+++ b/sdk/lib/_internal/compiler/implementation/constants.dart
@@ -102,7 +102,7 @@ abstract class PrimitiveConstant extends Constant {
   bool operator ==(var other) {
     if (other is !PrimitiveConstant) return false;
     PrimitiveConstant otherPrimitive = other;
-    // We use == instead of === so that DartStrings compare correctly.
+    // We use == instead of 'identical' so that DartStrings compare correctly.
     return value == otherPrimitive.value;
   }