Async-step, first cut.

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/atomic.h"
 #include "vm/globals.h"
@@ skipping 1146 matching lines @@
   const uint8_t* data() const { OPEN_ARRAY_START(uint8_t, uint8_t); }
 };
 
 
 class RawLocalVarDescriptors : public RawObject {
  public:
   enum VarInfoKind {
     kStackVar = 1,
     kContextVar,
     kContextLevel,
-    kSavedCurrentContext
+    kSavedCurrentContext,
+    kAsyncOperation
   };
 
   enum {
     kKindPos = 0,
     kKindSize = 8,
     kIndexPos = kKindPos + kKindSize,
     // Since there are 24 bits for the stack slot index, Functions can have
     // only ~16.7 million stack slots.
     kPayloadSize = sizeof(int32_t) * kBitsPerByte,
     kIndexSize = kPayloadSize - kIndexPos,
@@ skipping 1009 matching lines @@
   COMPILE_ASSERT(kExternalTypedDataInt8ArrayCid ==
                  kTypedDataInt8ArrayViewCid + 15);
   COMPILE_ASSERT(kByteBufferCid == kExternalTypedDataInt8ArrayCid + 14);
   COMPILE_ASSERT(kNullCid == kByteBufferCid + 1);
   return (kNullCid - kTypedDataInt8ArrayCid);
 }
 
 }  // namespace dart
 
 #endif  // VM_RAW_OBJECT_H_