Allocate a Dart_CMessage structure when decoding a message into C structures

runtime/vm/dart_api_impl.cc

Index: runtime/vm/dart_api_impl.cc
diff --git a/runtime/vm/dart_api_impl.cc b/runtime/vm/dart_api_impl.cc
index 8e98e49c99bdda2ed05ad8bf02284222dbf3104d..78a95b6786b76dbf7e8a55e8adcb7d119a3e82e3 100644
--- a/runtime/vm/dart_api_impl.cc
+++ b/runtime/vm/dart_api_impl.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// 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.
 
@@ -2498,4 +2498,14 @@ DART_EXPORT void Dart_GetPprofSymbolInfo(void** buffer, int* buffer_size) {
 }
 
 
+// --- Message encoding/decoding ----
+
+
+DART_EXPORT Dart_CMessage* Dart_DecodeMessage(uint8_t* message,
+                                              intptr_t length,
+                                              Allocator allocator) {
+  CMessageReader reader(message, length, allocator);
+  return reader.ReadMessage();
+}
+
 }  // namespace dart