Land http://codereview.chromium.org/11047027/ for Matthias:

runtime/vm/raw_object.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_RAW_OBJECT_H_
 #define VM_RAW_OBJECT_H_
 
 #include "platform/assert.h"
 #include "vm/globals.h"
 #include "vm/token.h"
@@ skipping 657 matching lines @@
   RAW_HEAP_OBJECT_IMPLEMENTATION(Library);
 
   RawObject** from() { return reinterpret_cast<RawObject**>(&ptr()->name_); }
   RawString* name_;
   RawString* url_;
   RawScript* script_;
   RawString* private_key_;
   RawArray* dictionary_;         // Top-level names in this library.
   RawArray* anonymous_classes_;  // Classes containing top-level elements.
   RawArray* imports_;            // List of Namespaces imported without prefix.
+  RawArray* exports_;            // List of re-exported Namespaces
   RawArray* loaded_scripts_;     // Array of scripts loaded in this library.
   RawObject** to() {
     return reinterpret_cast<RawObject**>(&ptr()->loaded_scripts_);
   }
 
   intptr_t index_;               // Library id number.
   intptr_t num_imports_;         // Number of entries in imports_.
   intptr_t num_anonymous_;       // Number of entries in anonymous_classes_.
   Dart_NativeEntryResolver native_entry_resolver_;  // Resolves natives.
   bool corelib_imported_;
@@ skipping 933 matching lines @@
          kExternalUint64ArrayCid == kByteArrayCid + 18 &&
          kExternalFloat32ArrayCid == kByteArrayCid + 19 &&
          kExternalFloat64ArrayCid == kByteArrayCid + 20 &&
          kStacktraceCid == kByteArrayCid + 21);
   return (index >= kByteArrayCid && index <= kExternalFloat64ArrayCid);
 }
 
 }  // namespace dart
 
 #endif  // VM_RAW_OBJECT_H_