Make some code gender neutral.

chrome/browser/chromeos/arc/arc_navigation_throttle.cc

Index: chrome/browser/chromeos/arc/arc_navigation_throttle.cc
diff --git a/chrome/browser/chromeos/arc/arc_navigation_throttle.cc b/chrome/browser/chromeos/arc/arc_navigation_throttle.cc
index 86601077fe8688a313404cc90f375db95c154a46..d49b08419ad08bfd26ebab015b503dec639d113a 100644
--- a/chrome/browser/chromeos/arc/arc_navigation_throttle.cc
+++ b/chrome/browser/chromeos/arc/arc_navigation_throttle.cc
@@ -178,7 +178,7 @@ void ArcNavigationThrottle::OnAppCandidatesReceived(
     return;
   }
 
-  // Swap Chrome app with any app in row |kMaxAppResults-1| iff his index is
+  // Swap Chrome app with any app in row |kMaxAppResults-1| iff its index is
   // bigger, thus ensuring the user can always see Chrome without scrolling.
   size_t chrome_app_index = 0;
   for (size_t i = 0; i < handlers.size(); ++i) {