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

third_party/tcmalloc/chromium/src/malloc_hook-inl.h

Index: third_party/tcmalloc/chromium/src/malloc_hook-inl.h
diff --git a/third_party/tcmalloc/chromium/src/malloc_hook-inl.h b/third_party/tcmalloc/chromium/src/malloc_hook-inl.h
index e7bfd617d22a7bbe7fc7611999a01f2f7b517f42..62107849ed471e5af511ed333d9911db9ec70c7a 100644
--- a/third_party/tcmalloc/chromium/src/malloc_hook-inl.h
+++ b/third_party/tcmalloc/chromium/src/malloc_hook-inl.h
@@ -104,7 +104,7 @@ static const int kHookListMaxValues = 7;
 // HookList: a class that provides synchronized insertions and removals and
 // lockless traversal.  Most of the implementation is in malloc_hook.cc.
 template <typename T>
-struct HookList {
+struct PERFTOOLS_DLL_DECL HookList {
   COMPILE_ASSERT(sizeof(T) <= sizeof(AtomicWord), T_should_fit_in_AtomicWord);
 
   // Adds value to the list.  Note that duplicates are allowed.  Thread-safe and
@@ -293,7 +293,7 @@ inline MallocHook::PreSbrkHook MallocHook::GetPreSbrkHook() {
   return base::internal::presbrk_hook_.Get();
 }
 
-inline void MallocHook::InvokePreSbrkHook(std::ptrdiff_t increment) {
+inline void MallocHook::InvokePreSbrkHook(ptrdiff_t increment) {
   if (!base::internal::presbrk_hooks_.empty() && increment != 0) {
     InvokePreSbrkHookSlow(increment);
   }
@@ -309,7 +309,7 @@ inline MallocHook::SbrkHook MallocHook::GetSbrkHook() {
 }
 
 inline void MallocHook::InvokeSbrkHook(const void* result,
-                                       std::ptrdiff_t increment) {
+                                       ptrdiff_t increment) {
   if (!base::internal::sbrk_hooks_.empty() && increment != 0) {
     InvokeSbrkHookSlow(result, increment);
   }