[heap] Remove some more dead code in MC

src/heap/mark-compact.h

 // Copyright 2012 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_MARK_COMPACT_H_
 #define V8_HEAP_MARK_COMPACT_H_
 
 #include <deque>
 
 #include "src/base/bits.h"
@@ skipping 548 matching lines @@
   void AddEvacuationCandidate(Page* p);
 
   // Prepares for GC by resetting relocation info in old and map spaces and
   // choosing spaces to compact.
   void Prepare();
 
   bool StartCompaction();
 
   void AbortCompaction();
 
-  // Determine type of object and emit deletion log event.
-  static void ReportDeleteIfNeeded(HeapObject* obj, Isolate* isolate);
-
-  // Distinguishable invalid map encodings (for single word and multiple words)
-  // that indicate free regions.
-  static const uint32_t kSingleFreeEncoding = 0;
-  static const uint32_t kMultiFreeEncoding = 1;
-
-  inline Isolate* isolate() const;
-
   CodeFlusher* code_flusher() { return code_flusher_; }
   inline bool is_code_flushing_enabled() const { return code_flusher_ != NULL; }
 
   INLINE(static bool ShouldSkipEvacuationSlotRecording(Object* host)) {
     return Page::FromAddress(reinterpret_cast<Address>(host))
         ->ShouldSkipEvacuationSlotRecording();
   }
 
   static inline bool IsOnEvacuationCandidate(HeapObject* obj) {
     return Page::FromAddress(reinterpret_cast<Address>(obj))
@@ skipping 255 matching lines @@
   ~EvacuationScope() { collector_->set_evacuation(false); }
 
  private:
   MarkCompactCollector* collector_;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_MARK_COMPACT_H_