Clean up header files.

BUG=138542
[email protected]
NOPRESUBMIT=true

Review URL: https://codereview.chromium.org/1544283002

Cr-Commit-Position: refs/heads/master@{#366903}
diff --git a/base/base_paths_android.cc b/base/base_paths_android.cc
index 56c6cc70..ca58179 100644
--- a/base/base_paths_android.cc
+++ b/base/base_paths_android.cc
@@ -5,6 +5,7 @@
 // Defines base::PathProviderAndroid which replaces base::PathProviderPosix for
 // Android in base/path_service.cc.
 
+#include <limits.h>
 #include <unistd.h>
 
 #include "base/android/jni_android.h"