Merge r77 from upstream tcmalloc to the local chromium branch....

third_party/tcmalloc/chromium/src/heap-checker.cc

Index: third_party/tcmalloc/chromium/src/heap-checker.cc
===================================================================
--- third_party/tcmalloc/chromium/src/heap-checker.cc	(revision 33071)
+++ third_party/tcmalloc/chromium/src/heap-checker.cc	(working copy)
@@ -47,9 +47,11 @@
 #ifdef HAVE_PTHREAD
 #include <pthread.h>
 #endif
+#ifdef HAVE_POLL_H
+#include <poll.h>
+#endif
 #include <sys/stat.h>
 #include <sys/types.h>
-#include <time.h>
 #include <assert.h>
 
 #ifdef HAVE_LINUX_PTRACE_H
@@ -2296,8 +2298,7 @@
   }
   if (FLAGS_heap_check_after_destructors) {
     if (HeapLeakChecker::DoMainHeapCheck()) {
-      const struct timespec sleep_time = { 0, 500000000 };  // 500 ms
-      nanosleep(&sleep_time, NULL);
+      poll(0, 0, 500);
         // Need this hack to wait for other pthreads to exit.
         // Otherwise tcmalloc find errors
         // on a free() call from pthreads.