Revert 126020 - Experiment for updating the tcmalloc chromium branch to r144 (gperftools 2.0).

third_party/tcmalloc/chromium/src/thread_cache.h

Index: third_party/tcmalloc/chromium/src/thread_cache.h
===================================================================
--- third_party/tcmalloc/chromium/src/thread_cache.h	(revision 126022)
+++ third_party/tcmalloc/chromium/src/thread_cache.h	(working copy)
@@ -88,6 +88,7 @@
   void Deallocate(void* ptr, size_t size_class);
 
   void Scavenge();
+  void Print(TCMalloc_Printer* out) const;
 
   int GetSamplePeriod();
 
@@ -124,6 +125,10 @@
   // REQUIRES: Static::pageheap_lock is held.
   static void GetThreadStats(uint64_t* total_bytes, uint64_t* class_count);
 
+  // Write debugging statistics to 'out'.
+  // REQUIRES: Static::pageheap_lock is held.
+  static void PrintThreads(TCMalloc_Printer* out);
+
   // Sets the total thread cache size to new_size, recomputing the
   // individual thread cache sizes as necessary.
   // REQUIRES: Static::pageheap lock is held.
@@ -209,11 +214,6 @@
       return FL_Pop(&list_);
     }
 
-    void* Next() {
-      if (list_ == NULL) return NULL;
-      return FL_Next(list_);
-    }
-
     void PushRange(int N, void *start, void *end) {
       FL_PushRange(&list_, start, end);
       length_ += N;
@@ -366,12 +366,6 @@
   FreeList* list = &list_[cl];
   size_ += Static::sizemap()->ByteSizeForClass(cl);
   ssize_t size_headroom = max_size_ - size_ - 1;
-
-  // This catches back-to-back frees of allocs in the same size
-  // class. A more comprehensive (and expensive) test would be to walk
-  // the entire freelist. But this might be enough to find some bugs.
-  ASSERT(ptr != list->Next());
-
   list->Push(ptr);
   ssize_t list_headroom =
       static_cast<ssize_t>(list->max_length()) - list->length();