Service isolate requests Observatory assets from embedder

runtime/bin/observatory_assets_empty.cc

Index: runtime/bin/observatory_assets_empty.cc
diff --git a/runtime/bin/snapshot_empty.cc b/runtime/bin/observatory_assets_empty.cc
similarity index 60%
copy from runtime/bin/snapshot_empty.cc
copy to runtime/bin/observatory_assets_empty.cc
index 4fd42b3d045b44f6f3345558bddd882c77f36ed8..a72f4b753728b246e7d99b6f934afab9359a5a29 100644
--- a/runtime/bin/snapshot_empty.cc
+++ b/runtime/bin/observatory_assets_empty.cc
@@ -1,9 +1,9 @@
-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// Copyright (c) 2015, 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.
 
-// This file is linked into the dart executable when it does not have a
-// snapshot linked into it.
+// This file is linked into the dart executable when it does not have
+// Observatory baked in.
 
 #if defined(_WIN32)
 typedef unsigned __int8 uint8_t;
@@ -13,12 +13,12 @@ typedef unsigned __int8 uint8_t;
 #endif
 #include <stddef.h>
 
-
 namespace dart {
 namespace bin {
 
-const uint8_t* vm_isolate_snapshot_buffer = NULL;
-const uint8_t* isolate_snapshot_buffer = NULL;
+static const char observatory_assets_archive_[] = { '\0' };
+unsigned int observatory_assets_archive_len = 0;
+const char* observatory_assets_archive = observatory_assets_archive_;
 
 }  // namespace bin
 }  // namespace dart