Make unittests work in component build

src/heap/scavenge-job.h

 // Copyright 2015 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.
 
 #ifndef V8_HEAP_SCAVENGE_JOB_H_
 #define V8_HEAP_SCAVENGE_JOB_H_
 
 #include "src/cancelable-task.h"
+#include "src/globals.h"
 #include "src/heap/gc-tracer.h"
 
 namespace v8 {
 namespace internal {
 
 class Heap;
 class Isolate;
 
 
 // This class posts idle tasks and performs scavenges in the idle tasks.
-class ScavengeJob {
+class V8_EXPORT_PRIVATE ScavengeJob {
  public:
   class IdleTask : public CancelableIdleTask {
    public:
     explicit IdleTask(Isolate* isolate, ScavengeJob* job)
         : CancelableIdleTask(isolate), job_(job) {}
     // CancelableIdleTask overrides.
     void RunInternal(double deadline_in_seconds) override;
 
    private:
     ScavengeJob* job_;
@@ skipping 41 matching lines @@
  private:
   void ScheduleIdleTask(Heap* heap);
   bool idle_task_pending_;
   bool idle_task_rescheduled_;
   int bytes_allocated_since_the_last_task_;
 };
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_SCAVENGE_JOB_H_