[NOT TO COMMIT!] r109: Diff of the current tcmalloc from the original google-perftools r109.

third_party/tcmalloc/chromium/src/memory_region_map.h

Index: third_party/tcmalloc/chromium/src/memory_region_map.h
diff --git a/third_party/tcmalloc/chromium/src/memory_region_map.h b/third_party/tcmalloc/chromium/src/memory_region_map.h
index 739514c22c61d0299402c4d69c62cffd6cc98985..09561ce1ac48ca6589db43a0e5e690266d5314c1 100644
--- a/third_party/tcmalloc/chromium/src/memory_region_map.h
+++ b/third_party/tcmalloc/chromium/src/memory_region_map.h
@@ -319,7 +319,7 @@ class MemoryRegionMap {
   static void MremapHook(const void* result, const void* old_addr,
                          size_t old_size, size_t new_size, int flags,
                          const void* new_addr);
-  static void SbrkHook(const void* result, ptrdiff_t increment);
+  static void SbrkHook(const void* result, std::ptrdiff_t increment);
 
   // Log all memory regions; Useful for debugging only.
   // Assumes Lock() is held