[heap] Use PageParallelJob for parallel evacuation

src/heap/mark-compact.h

 // 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.
 
 #ifndef V8_HEAP_MARK_COMPACT_H_
 #define V8_HEAP_MARK_COMPACT_H_
 
 #include "src/base/bits.h"
 #include "src/heap/spaces.h"
 #include "src/heap/store-buffer.h"
@@ skipping 303 matching lines @@
 
 
 // Defined in isolate.h.
 class ThreadLocalTop;
 
 
 // -------------------------------------------------------------------------
 // Mark-Compact collector
 class MarkCompactCollector {
  public:
+  class Evacuator;
+
   enum IterationMode {
     kKeepMarking,
     kClearMarkbits,
   };
 
   static void Initialize();
 
   void SetUp();
 
   void TearDown();
@@ skipping 163 matching lines @@
     return free_list_old_space_;
   }
   base::SmartPointer<FreeList>& free_list_code_space() {
     return free_list_code_space_;
   }
   base::SmartPointer<FreeList>& free_list_map_space() {
     return free_list_map_space_;
   }
 
  private:
-  class CompactionTask;
   class EvacuateNewSpaceVisitor;
   class EvacuateOldSpaceVisitor;
   class EvacuateVisitorBase;
-  class Evacuator;
   class HeapObjectVisitor;
   class SweeperTask;
 
   typedef std::vector<Page*> SweepingList;
 
   explicit MarkCompactCollector(Heap* heap);
 
   bool WillBeDeoptimized(Code* code);
   void ClearInvalidRememberedSetSlots();
 
@@ skipping 175 matching lines @@
   void SweepSpaces();
 
   void EvacuateNewSpacePrologue();
   void EvacuateNewSpaceEpilogue();
 
   void EvacuatePagesInParallel();
 
   // The number of parallel compaction tasks, including the main thread.
   int NumberOfParallelCompactionTasks(int pages, intptr_t live_bytes);
 
-  void StartParallelCompaction(Evacuator** evacuators, int len);
-  void WaitUntilCompactionCompleted(Evacuator** evacuators, int len);
-
   void EvacuateNewSpaceAndCandidates();
 
   void UpdatePointersAfterEvacuation();
 
   // Iterates through all live objects on a page using marking information.
   // Returns whether all objects have successfully been visited.
   bool VisitLiveObjects(MemoryChunk* page, HeapObjectVisitor* visitor,
                         IterationMode mode);
 
   void VisitLiveObjectsBody(Page* page, ObjectVisitor* visitor);
@@ skipping 145 matching lines @@
  private:
   MarkCompactCollector* collector_;
 };
 
 
 const char* AllocationSpaceName(AllocationSpace space);
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_MARK_COMPACT_H_