[NOT TO COMMIT!] Replace third_party/tcmalloc/chromium with tcmalloc r136 (the latest).

third_party/tcmalloc/chromium/src/memory_region_map.cc

Index: third_party/tcmalloc/chromium/src/memory_region_map.cc
diff --git a/third_party/tcmalloc/chromium/src/memory_region_map.cc b/third_party/tcmalloc/chromium/src/memory_region_map.cc
index 31c3bc2f9bcd4f254b16637416f48f9455af0916..e281706b929faa5021106612c2c0157d44ae474a 100644
--- a/third_party/tcmalloc/chromium/src/memory_region_map.cc
+++ b/third_party/tcmalloc/chromium/src/memory_region_map.cc
@@ -145,6 +145,8 @@ SpinLock MemoryRegionMap::owner_lock_(  // ACQUIRED_AFTER(lock_)
     SpinLock::LINKER_INITIALIZED);
 int MemoryRegionMap::recursion_count_ = 0;  // GUARDED_BY(owner_lock_)
 pthread_t MemoryRegionMap::lock_owner_tid_;  // GUARDED_BY(owner_lock_)
+int64 MemoryRegionMap::map_size_ = 0;
+int64 MemoryRegionMap::unmap_size_ = 0;
 
 // ========================================================================= //
 
@@ -462,6 +464,7 @@ void MemoryRegionMap::RecordRegionAddition(const void* start, size_t size) {
               reinterpret_cast<void*>(region.caller()));
   // Note: none of the above allocates memory.
   Lock();  // recursively lock
+  map_size_ += size;
   InsertRegionLocked(region);
     // This will (eventually) allocate storage for and copy over the stack data
     // from region.call_stack_data_ that is pointed by region.call_stack().
@@ -573,6 +576,7 @@ void MemoryRegionMap::RecordRegionRemoval(const void* start, size_t size) {
               reinterpret_cast<void*>(end_addr),
               regions_->size());
   if (VLOG_IS_ON(12))  LogAllLocked();
+  unmap_size_ += size;
   Unlock();
 }
 
@@ -582,8 +586,8 @@ void MemoryRegionMap::MmapHook(const void* result,
                                int fd, off_t offset) {
   // TODO(maxim): replace all 0x%"PRIxS" by %p when RAW_VLOG uses a safe
   // snprintf reimplementation that does not malloc to pretty-print NULL
-  RAW_VLOG(10, "MMap = 0x%"PRIxPTR" of %"PRIuS" at %llu "
-              "prot %d flags %d fd %d offs %lld",
+  RAW_VLOG(10, "MMap = 0x%"PRIxPTR" of %"PRIuS" at %"PRIu64" "
+              "prot %d flags %d fd %d offs %"PRId64,
               reinterpret_cast<uintptr_t>(result), size,
               reinterpret_cast<uint64>(start), prot, flags, fd,
               static_cast<int64>(offset));
@@ -614,9 +618,9 @@ void MemoryRegionMap::MremapHook(const void* result,
   }
 }
 
-extern "C" void* __sbrk(std::ptrdiff_t increment);  // defined in libc
+extern "C" void* __sbrk(ptrdiff_t increment);  // defined in libc
 
-void MemoryRegionMap::SbrkHook(const void* result, std::ptrdiff_t increment) {
+void MemoryRegionMap::SbrkHook(const void* result, ptrdiff_t increment) {
   RAW_VLOG(10, "Sbrk = 0x%"PRIxPTR" of %"PRIdS"", (uintptr_t)result, increment);
   if (result != reinterpret_cast<void*>(-1)) {
     if (increment > 0) {