Use the ThreadPool for all isolates and native ports. Previously,

runtime/vm/code_generator.cc

Index: runtime/vm/code_generator.cc
===================================================================
--- runtime/vm/code_generator.cc	(revision 6698)
+++ runtime/vm/code_generator.cc	(working copy)
@@ -12,6 +12,7 @@
 #include "vm/exceptions.h"
 #include "vm/object_store.h"
 #include "vm/message.h"
+#include "vm/message_handler.h"
 #include "vm/resolver.h"
 #include "vm/runtime_entry.h"
 #include "vm/stack_frame.h"
@@ -1125,20 +1126,6 @@
 }
 
 
-static RawInstance* DeserializeMessage(void* data) {
-  // Create a snapshot object using the buffer.
-  const Snapshot* snapshot = Snapshot::SetupFromBuffer(data);
-  ASSERT(snapshot->IsMessageSnapshot());
-
-  // Read object back from the snapshot.
-  SnapshotReader reader(snapshot, Isolate::Current());
-  Instance& instance = Instance::Handle();
-  instance ^= reader.ReadObject();
-  return instance.raw();
-}
-
-
-
 DEFINE_RUNTIME_ENTRY(StackOverflow, 0) {
   ASSERT(arguments.Count() ==
          kStackOverflowRuntimeEntry.argument_count());
@@ -1157,28 +1144,7 @@
 
   uword interrupt_bits = isolate->GetAndClearInterrupts();
   if (interrupt_bits & Isolate::kMessageInterrupt) {
-    while (true) {
-      // TODO(turnidge): This code is duplicated elsewhere.  Consolidate.
-      Message* message =
-          isolate->message_handler()->queue()->DequeueNoWaitWithPriority(
-              Message::kOOBPriority);
-      if (message == NULL) {
-        // No more OOB messages to handle.
-        break;
-      }
-      const Instance& msg =
-          Instance::Handle(DeserializeMessage(message->data()));
-      // For now the only OOB messages are Mirrors messages.
-      const Object& result = Object::Handle(
-          DartLibraryCalls::HandleMirrorsMessage(
-              message->dest_port(), message->reply_port(), msg));
-      delete message;
-      if (result.IsError()) {
-        // TODO(turnidge): Propagating the error is probably wrong here.
-        Exceptions::PropagateError(result);
-      }
-      ASSERT(result.IsNull());
-    }
+    isolate->message_handler()->HandleOOBMessages();
   }
   if (interrupt_bits & Isolate::kApiInterrupt) {
     Dart_IsolateInterruptCallback callback = isolate->InterruptCallback();