Enable concurrent optimization test after migrating scopes to Thread*

runtime/vm/timer.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_TIMER_H_
 #define VM_TIMER_H_
 
 #include "platform/utils.h"
 #include "vm/allocation.h"
 #include "vm/flags.h"
@@ skipping 160 matching lines @@
   bool nested_;
   Timer* const timer_;
 
   DISALLOW_ALLOCATION();
   DISALLOW_COPY_AND_ASSIGN(TimerScope);
 };
 
 
 class PauseTimerScope : public StackResource {
  public:
-  PauseTimerScope(bool flag, Timer* timer, Isolate* isolate = NULL)
-      : StackResource(isolate),
+  PauseTimerScope(bool flag, Timer* timer, Thread* thread = NULL)
+      : StackResource(thread),
         nested_(false),
         timer_(flag ? timer : NULL) {
     if (timer_) {
       if (timer_->running()) {
         timer_->Stop();
       } else {
         nested_ = true;
       }
     }
   }
@@ skipping 14 matching lines @@
 };
 
 
 // Macros to deal with named timers in the isolate.
 #define START_TIMER(isolate, name)                                             \
 isolate->timer_list().name().Start();
 
 #define STOP_TIMER(isolate, name)                                              \
 isolate->timer_list().name().Stop();
 
-#define TIMERSCOPE(isolate, name)                                              \
-  TimerScope vm_internal_timer_(true, &(isolate->timer_list().name()), isolate)
+#define TIMERSCOPE(thread, name)                                               \
+  TimerScope vm_internal_timer_(                                               \
+      true, &(thread->isolate()->timer_list().name()), thread)
 
-#define PAUSETIMERSCOPE(isolate, name)                                         \
+#define PAUSETIMERSCOPE(thread, name)                                          \
 PauseTimerScope vm_internal_timer_(true,                                       \
-                                   &(isolate->timer_list().name()),            \
-                                   isolate)
+                                   &(thread->isolate()->timer_list().name()),  \
+                                   thread)
 
 }  // namespace dart
 
 #endif  // VM_TIMER_H_