Delete dead store buffer verification code and code that changes the store buffer in debug mode.

src/heap/store-buffer.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_STORE_BUFFER_H_
 #define V8_STORE_BUFFER_H_
 
 #include "src/allocation.h"
 #include "src/base/logging.h"
 #include "src/base/platform/platform.h"
@@ skipping 65 matching lines @@
   Object*** Top() { return reinterpret_cast<Object***>(old_top_); }
   void SetTop(Object*** top) {
     DCHECK(top >= Start());
     DCHECK(top <= Limit());
     old_top_ = reinterpret_cast<Address*>(top);
   }
 
   bool old_buffer_is_sorted() { return old_buffer_is_sorted_; }
   bool old_buffer_is_filtered() { return old_buffer_is_filtered_; }
 
-  // Goes through the store buffer removing pointers to things that have
-  // been promoted.  Rebuilds the store buffer completely if it overflowed.
-  void SortUniq();
-
   void EnsureSpace(intptr_t space_needed);
   void Verify();
 
   bool PrepareForIteration();
 
-#ifdef DEBUG
-  void Clean();
-  // Slow, for asserts only.
-  bool CellIsInStoreBuffer(Address cell);
-#endif
-
   void Filter(int flag);
 
   // Eliminates all stale store buffer entries from the store buffer, i.e.,
   // slots that are not part of live objects anymore. This method must be
   // called after marking, when the whole transitive closure is known and
   // must be called before sweeping when mark bits are still intact.
   void ClearInvalidStoreBufferEntries();
   void VerifyValidStoreBufferEntries();
 
  private:
@@ skipping 26 matching lines @@
   // Two hash sets used for filtering.
   // If address is in the hash set then it is guaranteed to be in the
   // old part of the store buffer.
   uintptr_t* hash_set_1_;
   uintptr_t* hash_set_2_;
   bool hash_sets_are_empty_;
 
   void ClearFilteringHashSets();
 
   bool SpaceAvailable(intptr_t space_needed);
-  void Uniq();
   void ExemptPopularPages(int prime_sample_step, int threshold);
 
   void ProcessOldToNewSlot(Address slot_address,
                            ObjectSlotCallback slot_callback);
 
   void FindPointersToNewSpaceInRegion(Address start, Address end,
                                       ObjectSlotCallback slot_callback);
 
   // For each region of pointers on a page in use from an old space call
   // visit_pointer_region callback.
@@ skipping 52 matching lines @@
   }
 
  private:
   StoreBuffer* store_buffer_;
   bool stored_state_;
 };
 }
 }  // namespace v8::internal
 
 #endif  // V8_STORE_BUFFER_H_