Reduce amount of boilerplate associated with bootstrap libraries.

runtime/vm/object_store.cc

Index: runtime/vm/object_store.cc
diff --git a/runtime/vm/object_store.cc b/runtime/vm/object_store.cc
index 8812a8ee50c3e8336d36ea31ca334bd9e0a644e7..c4557f465b268078b12f8cc0ef94533dcd51c9a4 100644
--- a/runtime/vm/object_store.cc
+++ b/runtime/vm/object_store.cc
@@ -65,7 +65,7 @@ ObjectStore::ObjectStore()
     collection_library_(Library::null()),
     convert_library_(Library::null()),
     developer_library_(Library::null()),
-    internal_library_(Library::null()),
+    _internal_library_(Library::null()),
     isolate_library_(Library::null()),
     math_library_(Library::null()),
     mirrors_library_(Library::null()),
@@ -73,7 +73,7 @@ ObjectStore::ObjectStore()
     profiler_library_(Library::null()),
     root_library_(Library::null()),
     typed_data_library_(Library::null()),
-    vmservice_library_(Library::null()),
+    _vmservice_library_(Library::null()),
     libraries_(GrowableObjectArray::null()),
     libraries_map_(Array::null()),
     closure_functions_(GrowableObjectArray::null()),
@@ -240,7 +240,7 @@ void ObjectStore::InitKnownObjects() {
   ASSERT(!cls.IsNull());
   set_stream_iterator_class(cls);
 
-  const Library& internal_lib = Library::Handle(internal_library());
+  const Library& internal_lib = Library::Handle(_internal_library());
   cls = internal_lib.LookupClass(Symbols::Symbol());
   set_symbol_class(cls);