VM: Support bootstrapping core libraries from Kernel binaries instead of source.

runtime/lib/class_id.cc

Index: runtime/lib/class_id.cc
diff --git a/runtime/lib/class_id.cc b/runtime/lib/class_id.cc
index 2d9f67d3defa7e0f00e1046d9dda4117b79b61a8..c950b0edd22e9128f893da29b1a7857b1dab943a 100644
--- a/runtime/lib/class_id.cc
+++ b/runtime/lib/class_id.cc
@@ -13,4 +13,24 @@ DEFINE_NATIVE_ENTRY(ClassID_getID, 1) {
   return Smi::New(instance.GetClassId());
 }
 
+
+DEFINE_NATIVE_ENTRY(ClassID_byName, 1) {
+  GET_NON_NULL_NATIVE_ARGUMENT(String, name, arguments->NativeArgAt(0));
+
+#define CLASS_LIST_WITH_NULL(V)                                                \
+  V(Null)                                                                      \
+  CLASS_LIST_NO_OBJECT(V)
+
+#define COMPARE(clazz)                                                         \
+  if (name.Equals(#clazz)) return Smi::New(k##clazz##Cid);
+
+  CLASS_LIST_WITH_NULL(COMPARE)
+
+#undef COMPARE
+#undef CLASS_LIST_WITH_NULL
+
+  UNREACHABLE();
+  return Smi::New(-1);
+}
+
 }  // namespace dart