Move sticky_error_ from isolate to thread

runtime/vm/message_handler.cc

 // 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.
 
 #include "vm/message_handler.h"
 
 #include "vm/dart.h"
 #include "vm/lockers.h"
 #include "vm/object.h"
 #include "vm/object_store.h"
@@ skipping 364 matching lines @@
           // Still paused.
           ASSERT(oob_queue_->IsEmpty());
           task_ = NULL;  // No task in queue.
           return;
         } else {
           PausedOnExitLocked(false);
         }
       }
       if (FLAG_trace_isolates) {
         if (status != kOK && isolate() != NULL) {
-          const Error& error =
-              Error::Handle(isolate()->object_store()->sticky_error());
+          const Error& error = Error::Handle(thread()->sticky_error());
           OS::Print("[-] Stopping message handler (%s):\n"
                     "\thandler:    %s\n"
                     "\terror:    %s\n",
                     MessageStatusString(status), name(), error.ToCString());
         } else {
           OS::Print("[-] Stopping message handler (%s):\n"
                     "\thandler:    %s\n",
                     MessageStatusString(status), name());
         }
       }
@@ skipping 151 matching lines @@
 
 
 void MessageHandler::AcquireQueues(AcquiredQueues* acquired_queues) {
   ASSERT(acquired_queues != NULL);
   // No double dipping.
   ASSERT(acquired_queues->handler_ == NULL);
   acquired_queues->Reset(this);
 }
 
 }  // namespace dart