Merge initial implementation of deferred handling in the VM:

runtime/vm/symbols.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_SYMBOLS_H_
 #define VM_SYMBOLS_H_
 
 #include "vm/object.h"
 #include "vm/snapshot_ids.h"
 
@@ skipping 48 matching lines @@
   V(SavedCurrentContextVar, ":saved_current_context_var")                      \
   V(SavedEntryContextVar, ":saved_entry_context_var")                          \
   V(SavedTryContextVar, ":saved_try_context_var")                              \
   V(ExceptionVar, ":exception_var")                                            \
   V(StackTraceVar, ":stack_trace_var")                                         \
   V(ListLiteralElement, "list literal element")                                \
   V(ForInIter, ":for-in-iter")                                                 \
   V(ClosureFunctionField, ":function")                                         \
   V(ClosureContextField, ":context")                                           \
   V(Library, "library")                                                        \
+  V(LoadLibrary, "loadLibrary")                                                \
+  V(_LibraryPrefix, "_LibraryPrefix")                                          \
   V(Native, "native")                                                          \
   V(Import, "import")                                                          \
   V(Source, "source")                                                          \
   V(Class, "Class")                                                            \
   V(Null, "Null")                                                              \
   V(Dynamic, "dynamic")                                                        \
   V(Void, "void")                                                              \
   V(UnresolvedClass, "UnresolvedClass")                                        \
   V(Type, "_Type")                                                             \
   V(TypeRef, "_TypeRef")                                                       \
@@ skipping 445 matching lines @@
   friend class SnapshotReader;
   friend class SnapshotWriter;
   friend class ApiMessageReader;
 
   DISALLOW_COPY_AND_ASSIGN(Symbols);
 };
 
 }  // namespace dart
 
 #endif  // VM_SYMBOLS_H_