Pass StatsTable shared memory via global descriptors on Posix rather than using named shared memory.

base/metrics/stats_table.h

Index: base/metrics/stats_table.h
diff --git a/base/metrics/stats_table.h b/base/metrics/stats_table.h
index 153af38c928c3379ecdedd4333883c3252c94547..578d2a9db94dfd27e7fa92b20b600e3c5f5808eb 100644
--- a/base/metrics/stats_table.h
+++ b/base/metrics/stats_table.h
@@ -25,6 +25,7 @@
 #include "base/base_export.h"
 #include "base/basictypes.h"
 #include "base/containers/hash_tables.h"
+#include "base/memory/shared_memory.h"
 #include "base/synchronization/lock.h"
 #include "base/threading/thread_local_storage.h"
 
@@ -116,6 +117,11 @@ class BASE_EXPORT StatsTable {
   // The maxinum number of threads/columns in the table.
   int GetMaxThreads() const;
 
+#if defined(OS_POSIX)
+  // Get the underlying shared memory handle for the table.
+  base::SharedMemoryHandle GetSharedMemoryHandle() const;
+#endif
+
   // The maximum length (in characters) of a Thread's name including
   // null terminator, as stored in the shared memory.
   static const int kMaxThreadNameLength = 32;