Fix GCC warning in heap-profile-table.cc.

third_party/tcmalloc/chromium/src/heap-profile-table.cc

Index: third_party/tcmalloc/chromium/src/heap-profile-table.cc
diff --git a/third_party/tcmalloc/chromium/src/heap-profile-table.cc b/third_party/tcmalloc/chromium/src/heap-profile-table.cc
index d880e562bda40757b82db5c7a797cbc12bb4a945..1e0eea5e115b6a8688bc2ea32e32f84d3ae96037 100644
--- a/third_party/tcmalloc/chromium/src/heap-profile-table.cc
+++ b/third_party/tcmalloc/chromium/src/heap-profile-table.cc
@@ -519,7 +519,7 @@ void HeapProfileTable::DumpMarkedIterator(const void* ptr, AllocValue* v,
   b.depth = v->bucket()->depth;
   b.stack = v->bucket()->stack;
   char addr[16];
-  snprintf(addr, 16, "0x%08" PRIxPTR, ptr);
+  snprintf(addr, 16, "0x%08" PRIxPTR, reinterpret_cast<uintptr_t>(ptr));
   char buf[1024];
   int len = UnparseBucket(b, buf, 0, sizeof(buf), addr, NULL);
   RawWrite(args.fd, buf, len);