Add JSNumber, JSInt and JSDouble for the new interceptor scheme.

sdk/lib/_internal/compiler/implementation/ssa/builder.dart

Index: sdk/lib/_internal/compiler/implementation/ssa/builder.dart
===================================================================
--- sdk/lib/_internal/compiler/implementation/ssa/builder.dart	(revision 15078)
+++ sdk/lib/_internal/compiler/implementation/ssa/builder.dart	(working copy)
@@ -437,6 +437,12 @@
         type = HType.READABLE_ARRAY;
       } else if (cls == builder.backend.jsStringClass) {
         type = HType.STRING;
+      } else if (cls == builder.backend.jsNumberClass) {
+        type = HType.NUMBER;
+      } else if (cls == builder.backend.jsIntClass) {
+        type = HType.INTEGER;
+      } else if (cls == builder.backend.jsDoubleClass) {
+        type = HType.DOUBLE;
       }
       value.guaranteedType = type;
     }