Move mutex.h into base/mutex.h.
We don't actually need any hackery to get the right mutex.h any
more, but since we planned on having the google3-like stuff
in google3-like locations, this is an easy one to fix.
Change-Id: Ie27464ebbc208a6f4e694a97cf26b1cee0737009
diff --git a/src/atomic.cc b/src/atomic.cc
index 008aa87..5cc750d 100644
--- a/src/atomic.cc
+++ b/src/atomic.cc
@@ -19,7 +19,7 @@
#include <pthread.h>
#include <vector>
-#include "mutex.h"
+#include "base/mutex.h"
#include "stl_util.h"
#include "stringprintf.h"
#include "thread.h"