Add a version number for full and script snapshots.

runtime/vm/dart_api_impl.cc

 // Copyright (c) 2013, 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.
 
 #include "include/dart_api.h"
 #include "include/dart_mirrors_api.h"
 #include "include/dart_native_api.h"
 
 #include "platform/assert.h"
 #include "vm/bigint_operations.h"
@@ skipping 4864 matching lines @@
     const String& library_url = String::Handle(isolate, library.url());
     return Api::NewError("%s: A script has already been loaded from '%s'.",
                          CURRENT_FUNC, library_url.ToCString());
   }
   CHECK_CALLBACK_STATE(isolate);
 
   SnapshotReader reader(snapshot->content(),
                         snapshot->length(),
                         snapshot->kind(),
                         isolate);
-  const Object& tmp = Object::Handle(isolate, reader.ReadObject());
+  const Object& tmp = Object::Handle(isolate, reader.ReadScriptSnapshot());
   if (!tmp.IsLibrary()) {
-    return Api::NewError("%s: Unable to deserialize snapshot correctly.",
-                         CURRENT_FUNC);
+    ASSERT(tmp.IsError());

[Ivan Posva, 2014/08/26 23:52:42]

If this is an error we should just return the error object. Otherwise we should
create a new error object as previously.

[siva, 2014/08/27 18:25:07]

Removed this error and change ReadScriptSnapshot to return a library object or
an error object.

+    return Api::NewHandle(isolate, tmp.raw());
   }
   library ^= tmp.raw();
   library.set_debuggable(true);
   isolate->object_store()->set_root_library(library);
   return Api::NewHandle(isolate, library.raw());
 }
 
 
 DART_EXPORT Dart_Handle Dart_RootLibrary() {
   Isolate* isolate = Isolate::Current();
@@ skipping 457 matching lines @@
 
 
 DART_EXPORT void Dart_RegisterRootServiceRequestCallback(
     const char* name,
     Dart_ServiceRequestCallback callback,
     void* user_data) {
   Service::RegisterRootEmbedderCallback(name, callback, user_data);
 }
 
 }  // namespace dart