Load vmservice from a .dill file when generating AOT snapshots.

runtime/bin/vmservice_impl.cc

Index: runtime/bin/vmservice_impl.cc
diff --git a/runtime/bin/vmservice_impl.cc b/runtime/bin/vmservice_impl.cc
index c41fe1b8185394327864235ecb5b5d2a748f8210..6a5cfccf7d16d8174165df0e41646308f34f50be 100644
--- a/runtime/bin/vmservice_impl.cc
+++ b/runtime/bin/vmservice_impl.cc
@@ -152,11 +152,17 @@ const char* VmService::error_msg_ = NULL;
 char VmService::server_uri_[kServerUriStringBufferSize];
 
 
-bool VmService::LoadForGenPrecompiled() {
+bool VmService::LoadForGenPrecompiled(void* vmservice_kernel) {
   Dart_Handle result;
   Dart_SetLibraryTagHandler(LibraryTagHandler);
-  Dart_Handle library =
-      LookupOrLoadLibrary(kVMServiceIOLibraryScriptResourceName);
+  Dart_Handle library;
+  if (vmservice_kernel != NULL) {
+    library = Dart_LoadLibrary(
+        Dart_NewStringFromCString(kVMServiceIOLibraryUri), Dart_Null(),
+        reinterpret_cast<Dart_Handle>(vmservice_kernel), 0, 0);
+  } else {
+    library = LookupOrLoadLibrary(kVMServiceIOLibraryScriptResourceName);
+  }
   ASSERT(library != Dart_Null());
   SHUTDOWN_ON_ERROR(library);
   result = Dart_SetNativeResolver(library, VmServiceIONativeResolver, NULL);