Merge google-perftools r109 (the current contents of third_party/tcmalloc/vendor)

third_party/tcmalloc/chromium/src/pagemap.h

Index: third_party/tcmalloc/chromium/src/pagemap.h
===================================================================
--- third_party/tcmalloc/chromium/src/pagemap.h	(revision 87277)
+++ third_party/tcmalloc/chromium/src/pagemap.h	(working copy)
@@ -46,6 +46,9 @@
 #define TCMALLOC_PAGEMAP_H_
 
 #include "config.h"
+
+#include <stddef.h>                     // for NULL, size_t
+#include <string.h>                     // for memset
 #if defined HAVE_STDINT_H
 #include <stdint.h>
 #elif defined HAVE_INTTYPES_H
@@ -59,7 +62,7 @@
 #include "common.h"
 #endif
 
-#include "internal_logging.h"
+#include "internal_logging.h"  // for ASSERT
 
 // Single-level array
 template <int BITS>