Add missing #include <cerrno> in string_to_number.cc
One of our toolchains does not expose |errno| in the global namespace.
BUG=none
Review-Url: https://codereview.webrtc.org/2926273002
Cr-Commit-Position: refs/heads/master@{#18506}
diff --git a/webrtc/base/string_to_number.cc b/webrtc/base/string_to_number.cc
index f880926..b8e969d 100644
--- a/webrtc/base/string_to_number.cc
+++ b/webrtc/base/string_to_number.cc
@@ -8,6 +8,7 @@
* be found in the AUTHORS file in the root of the source tree.
*/
+#include <cerrno>
#include <cstdlib>
#include "webrtc/base/string_to_number.h"