Cleanup Mutex and related classes.

src/heap.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1864 matching lines @@
       } else if (type == FIXED_ARRAY_TYPE) {
         ASSERT(sub_type <= LAST_FIXED_ARRAY_SUB_TYPE);
         object_counts_[FIRST_FIXED_ARRAY_SUB_TYPE + sub_type]++;
         object_sizes_[FIRST_FIXED_ARRAY_SUB_TYPE + sub_type] += size;
       }
     }
   }
 
   void CheckpointObjectStats();
 
-  // We don't use a ScopedLock here since we want to lock the heap
+  // We don't use a LockGuard here since we want to lock the heap
   // only when FLAG_concurrent_recompilation is true.
   class RelocationLock {
    public:
     explicit RelocationLock(Heap* heap);
 
     ~RelocationLock() {
       if (FLAG_concurrent_recompilation) {
 #ifdef DEBUG
         heap_->relocation_mutex_locked_by_optimizer_thread_ = false;
 #endif  // DEBUG
@@ skipping 1163 matching lines @@
   DisallowHeapAllocation no_allocation;  // i.e. no gc allowed.
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(PathTracer);
 };
 #endif  // DEBUG
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_H_