[heap] Add VMState to IncrementalMarking observer

src/heap/incremental-marking-job.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/heap/incremental-marking-job.h"
 
 #include "src/base/platform/time.h"
 #include "src/heap/heap-inl.h"
 #include "src/heap/heap.h"
 #include "src/heap/incremental-marking.h"
@@ skipping 26 matching lines @@
       heap->MonotonicallyIncreasingTimeInMs() + kIncrementalMarkingDelayMs;
   heap->incremental_marking()->AdvanceIncrementalMarking(
       deadline, i::IncrementalMarking::NO_GC_VIA_STACK_GUARD,
       i::IncrementalMarking::FORCE_COMPLETION, i::StepOrigin::kTask);
   heap->FinalizeIncrementalMarkingIfComplete(
       GarbageCollectionReason::kFinalizeMarkingViaTask);
 }
 
 void IncrementalMarkingJob::Task::RunInternal() {
   VMState<GC> state(isolate());
-  RuntimeCallTimerScope(isolate(), &RuntimeCallStats::GC_IncrementalMarkingJob);
+  RuntimeCallTimerScope runtime_timer(
+      isolate(), &RuntimeCallStats::GC_IncrementalMarkingJob);
 
   Heap* heap = isolate()->heap();
   job_->NotifyTask();
   IncrementalMarking* incremental_marking = heap->incremental_marking();
   if (incremental_marking->IsStopped()) {
     if (heap->IncrementalMarkingLimitReached() !=
         Heap::IncrementalMarkingLimit::kNoLimit) {
       heap->StartIncrementalMarking(Heap::kNoGCFlags,
                                     GarbageCollectionReason::kIdleTask,
                                     kNoGCCallbackFlags);
     }
   }
   if (!incremental_marking->IsStopped()) {
     Step(heap);
     if (!incremental_marking->IsStopped()) {
       job_->ScheduleTask(heap);
     }
   }
 }
 
 }  // namespace internal
 }  // namespace v8