- Add a minimal implementation of Capability.

runtime/vm/raw_object.h

Index: runtime/vm/raw_object.h
===================================================================
--- runtime/vm/raw_object.h	(revision 35191)
+++ runtime/vm/raw_object.h	(working copy)
@@ -60,15 +60,18 @@
       V(Double)                                                                \
     V(Bool)                                                                    \
     V(GrowableObjectArray)                                                     \
+    V(Float32x4)                                                               \
+    V(Int32x4)                                                                 \
+    V(Float64x2)                                                               \
     V(TypedData)                                                               \
     V(ExternalTypedData)                                                       \
+    V(Capability)                                                              \
+    V(ReceivePort)                                                             \
+    V(SendPort)                                                                \
     V(Stacktrace)                                                              \
     V(JSRegExp)                                                                \
     V(WeakProperty)                                                            \
     V(MirrorReference)                                                         \
-    V(Float32x4)                                                               \
-    V(Int32x4)                                                                 \
-    V(Float64x2)                                                               \
     V(UserTag)                                                                 \
 
 #define CLASS_LIST_ARRAYS(V)                                                   \
@@ -1504,7 +1507,35 @@
   friend class RawTokenStream;
 };
 
+// VM implementations of the basic types in the isolate.
+class RawCapability : public RawInstance {
+  RAW_HEAP_OBJECT_IMPLEMENTATION(Capability);
+  uint64_t id_;
+};
 
+
+class RawSendPort : public RawInstance {
+  RAW_HEAP_OBJECT_IMPLEMENTATION(SendPort);
+  Dart_Port id_;
+
+  friend class ReceivePort;
+};
+
+
+class RawReceivePort : public RawInstance {
+  RAW_HEAP_OBJECT_IMPLEMENTATION(ReceivePort);
+
+  RawObject** from() {
+    return reinterpret_cast<RawObject**>(&ptr()->send_port_);
+  }
+  RawSendPort* send_port_;
+  RawInstance* handler_;
+  RawObject** to() {
+    return reinterpret_cast<RawObject**>(&ptr()->handler_);
+  }
+};
+
+
 // VM type for capturing stacktraces when exceptions are thrown,
 // Currently we don't have any interface that this object is supposed
 // to implement so we just support the 'toString' method which
@@ -1685,10 +1716,9 @@
 
 inline bool RawObject::IsBuiltinListClassId(intptr_t index) {
   // Make sure this function is updated when new builtin List types are added.
-  ASSERT(kImmutableArrayCid == kArrayCid + 1 &&
-         kTypedDataCid == kGrowableObjectArrayCid + 1);
+  ASSERT(kImmutableArrayCid == kArrayCid + 1);
   return ((index >= kArrayCid && index <= kImmutableArrayCid) ||
-          (index >= kGrowableObjectArrayCid && index < kTypedDataCid) ||
+          (index == kGrowableObjectArrayCid) ||
           IsTypedDataClassId(index) ||
           IsTypedDataViewClassId(index) ||
           IsExternalTypedDataClassId(index));