Remove relocation lock.

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 1808 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
-  // only when FLAG_parallel_recompilation is true.
-  class RelocationLock {
-   public:
-    explicit RelocationLock(Heap* heap) : heap_(heap) {
-      if (FLAG_parallel_recompilation) {
-        heap_->relocation_mutex_->Lock();
-#ifdef DEBUG
-        heap_->relocation_mutex_locked_ = true;
-#endif  // DEBUG
-      }
-    }
-
-    ~RelocationLock() {
-      if (FLAG_parallel_recompilation) {
-#ifdef DEBUG
-        heap_->relocation_mutex_locked_ = false;
-#endif  // DEBUG
-        heap_->relocation_mutex_->Unlock();
-      }
-    }
-
-#ifdef DEBUG
-    static bool IsLocked(Heap* heap) {
-      return heap->relocation_mutex_locked_;
-    }
-#endif  // DEBUG
-
-   private:
-    Heap* heap_;
-  };
-
  private:
   Heap();
 
   // This can be calculated directly from a pointer to the heap; however, it is
   // more expedient to get at the isolate directly from within Heap methods.
   Isolate* isolate_;
 
   Object* roots_[kRootListLength];
 
   intptr_t code_range_size_;
@@ skipping 449 matching lines @@
   bool configured_;
 
   ExternalStringTable external_string_table_;
 
   ErrorObjectList error_object_list_;
 
   VisitorDispatchTable<ScavengingCallback> scavenging_visitors_table_;
 
   MemoryChunk* chunks_queued_for_free_;
 
-  Mutex* relocation_mutex_;
-#ifdef DEBUG
-  bool relocation_mutex_locked_;
-#endif  // DEBUG;
-
   friend class Factory;
   friend class GCTracer;
   friend class DisallowAllocationFailure;
   friend class AlwaysAllocateScope;
   friend class Page;
   friend class Isolate;
   friend class MarkCompactCollector;
   friend class MarkCompactMarkingVisitor;
   friend class MapCompact;
 #ifdef VERIFY_HEAP
@@ skipping 685 matching lines @@
   AssertNoAllocation no_alloc;  // i.e. no gc allowed.
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(PathTracer);
 };
 #endif  // DEBUG
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_H_