[heap] Cleanup: Align naming of parallel sweeping with parallel compaction.

src/heap/mark-compact.h

Index: src/heap/mark-compact.h
diff --git a/src/heap/mark-compact.h b/src/heap/mark-compact.h
index 6fc5dbba6206421feba3dab05b972d7331c771e8..6558eb2ddebba2b6349c64eb2fbf4f2c9ea40247 100644
--- a/src/heap/mark-compact.h
+++ b/src/heap/mark-compact.h
@@ -542,27 +542,8 @@ class MarkCompactCollector {
 
   MarkingParity marking_parity_;
 
-  // True if we are collecting slots to perform evacuation from evacuation
-  // candidates.
-  bool compacting_;
-
   bool was_marked_incrementally_;
 
-  // True if concurrent or parallel sweeping is currently in progress.
-  bool sweeping_in_progress_;
-
-  // True if parallel compaction is currently in progress.
-  bool parallel_compaction_in_progress_;
-
-  // Synchronize sweeper threads.
-  base::Semaphore pending_sweeper_jobs_semaphore_;
-
-  // Synchronize compaction tasks.
-  base::Semaphore pending_compaction_tasks_semaphore_;
-
-  // Number of active compaction tasks (including main thread).
-  intptr_t concurrent_compaction_tasks_active_;
-
   bool evacuation_;
 
   SlotsBufferAllocator* slots_buffer_allocator_;
@@ -793,6 +774,25 @@ class MarkCompactCollector {
   base::SmartPointer<FreeList> free_list_code_space_;
   base::SmartPointer<FreeList> free_list_map_space_;
 
+  // True if we are collecting slots to perform evacuation from evacuation
+  // candidates.
+  bool compacting_;
+
+  // True if concurrent or parallel sweeping is currently in progress.
+  bool sweeping_in_progress_;
+
+  // True if parallel compaction is currently in progress.
+  bool compaction_in_progress_;
+
+  // Semaphore used to synchronize sweeper tasks.
+  base::Semaphore pending_sweeper_tasks_semaphore_;
+
+  // Semaphore used to synchronize compaction tasks.
+  base::Semaphore pending_compaction_tasks_semaphore_;
+
+  // Number of active compaction tasks (including main thread).
+  intptr_t concurrent_compaction_tasks_active_;
+
   friend class Heap;
 };