"up-to-date" should only use hyphens when used as compound modifier of a noun

base/sys_info_android.cc

Index: base/sys_info_android.cc
diff --git a/base/sys_info_android.cc b/base/sys_info_android.cc
index bc0e3fa80dafb2e2345a87b786b817ea5a210a44..447c2498de947eb727e6cefc290e263767bccae1 100644
--- a/base/sys_info_android.cc
+++ b/base/sys_info_android.cc
@@ -61,7 +61,7 @@ namespace {
 // Default version of Android to fall back to when actual version numbers
 // cannot be acquired. Use the latest Android release with a higher bug fix
 // version to avoid unnecessarily comparison errors with the latest release.
-// This should be manually kept up-to-date on each Android release.
+// This should be manually kept up to date on each Android release.
 const int kDefaultAndroidMajorVersion = 6;
 const int kDefaultAndroidMinorVersion = 0;
 const int kDefaultAndroidBugfixVersion = 99;