Replace SmartPointer<T> with unique_ptr<T>

src/heap/spaces.h

 // Copyright 2011 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_SPACES_H_
 #define V8_HEAP_SPACES_H_
 
 #include <list>
+#include <memory>
 
 #include "src/allocation.h"
 #include "src/base/atomic-utils.h"
 #include "src/base/atomicops.h"
 #include "src/base/bits.h"
 #include "src/base/hashmap.h"
 #include "src/base/platform/mutex.h"
 #include "src/flags.h"
 #include "src/heap/marking.h"
 #include "src/list.h"
@@ skipping 902 matching lines @@
     DCHECK_GE(bytes, 0);
     committed_ -= bytes;
     DCHECK_GE(committed_, 0);
   }
 
 #ifdef DEBUG
   virtual void Print() = 0;
 #endif
 
  protected:
-  v8::base::SmartPointer<List<AllocationObserver*>> allocation_observers_;
+  std::unique_ptr<List<AllocationObserver*>> allocation_observers_;
   bool allocation_observers_paused_;
 
  private:
   Heap* heap_;
   AllocationSpace id_;
   Executability executable_;
 
   // Keeps track of committed memory in a space.
   intptr_t committed_;
   intptr_t max_committed_;
+
+  DISALLOW_COPY_AND_ASSIGN(Space);
 };
 
 
 class MemoryChunkValidator {
   // Computed offsets should match the compiler generated ones.
   STATIC_ASSERT(MemoryChunk::kSizeOffset == offsetof(MemoryChunk, size_));
   STATIC_ASSERT(MemoryChunk::kLiveBytesOffset ==
                 offsetof(MemoryChunk, live_byte_count_));
   STATIC_ASSERT(MemoryChunk::kOldToNewSlotsOffset ==
                 offsetof(MemoryChunk, old_to_new_slots_));
@@ skipping 2030 matching lines @@
     count = 0;
   }
   // Must be small, since an iteration is used for lookup.
   static const int kMaxComments = 64;
 };
 #endif
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_SPACES_H_