Remving global statics from the headers, so we can split-link.

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 d972e7cb9187732a9ba1785cdcc636569d9c1424..0abc2147155b34a4054a5a026b7edd555492005d 100644
--- a/base/metrics/stats_table.h
+++ b/base/metrics/stats_table.h
@@ -52,10 +52,10 @@ class BASE_EXPORT StatsTable {
 
   // For convenience, we create a static table.  This is generally
   // used automatically by the counters.
-  static StatsTable* current() { return global_table_; }
+  static StatsTable* current();
 
   // Set the global table for use in this process.
-  static void set_current(StatsTable* value) { global_table_ = value; }
+  static void set_current(StatsTable* value);
 
   // Get the slot id for the calling thread. Returns 0 if no
   // slot is assigned.
@@ -185,8 +185,6 @@ class BASE_EXPORT StatsTable {
   CountersMap counters_;
   ThreadLocalStorage::Slot tls_index_;
 
-  static StatsTable* global_table_;
-
   DISALLOW_COPY_AND_ASSIGN(StatsTable);
 };