Add an external array type to support typed arrays.

runtime/vm/raw_object.h

 // Copyright (c) 2011, 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 "vm/assert.h"
 #include "vm/globals.h"
 #include "vm/snapshot.h"
@@ skipping 34 matching lines @@
         V(Mint)                                                                \
         V(Bigint)                                                              \
       V(Double)                                                                \
     V(String)                                                                  \
       V(OneByteString)                                                         \
       V(TwoByteString)                                                         \
       V(FourByteString)                                                        \
     V(Bool)                                                                    \
     V(Array)                                                                   \
       V(ImmutableArray)                                                        \
+    V(ByteBuffer)                                                              \
     V(Closure)                                                                 \
     V(Stacktrace)                                                              \
     V(JSRegExp)                                                                \
 
 #define CLASS_LIST(V)                                                          \
   V(Object)                                                                    \
   CLASS_LIST_NO_OBJECT(V)
 
 
 // Forward declarations.
@@ skipping 647 matching lines @@
 
   friend class RawImmutableArray;
 };
 
 
 class RawImmutableArray : public RawArray {
   RAW_HEAP_OBJECT_IMPLEMENTATION(ImmutableArray);
 };
 
 
+class RawByteBuffer : public RawInstance {
+  RAW_HEAP_OBJECT_IMPLEMENTATION(ByteBuffer);
+
+  RawObject** from() { return reinterpret_cast<RawObject**>(&ptr()->length_); }
+  RawSmi* length_;
+  RawObject** to() {
+    return reinterpret_cast<RawObject**>(&ptr()->length_);
+  }
+  uint8_t* data_;
+};
+
+
 class RawClosure : public RawInstance {
   RAW_HEAP_OBJECT_IMPLEMENTATION(Closure);
 
   RawObject** from() {
     return reinterpret_cast<RawObject**>(&ptr()->type_arguments_);
   }
   RawTypeArguments* type_arguments_;
   RawFunction* function_;
   RawContext* context_;
   // TODO(iposva): Remove this temporary hack.
@@ skipping 38 matching lines @@
   intptr_t type_;  // Uninitialized, simple or complex.
   intptr_t flags_;  // Represents global/local, case insensitive, multiline.
 
   // Variable length data follows here.
   uint8_t data_[0];
 };
 
 }  // namespace dart
 
 #endif  // VM_RAW_OBJECT_H_