Make some code gender neutral.

chrome/utility/importer/safari_importer.mm

Index: chrome/utility/importer/safari_importer.mm
diff --git a/chrome/utility/importer/safari_importer.mm b/chrome/utility/importer/safari_importer.mm
index a719a102905362886c54a3b51f2f1375f51c6903..035c761ebd7b3d8adc210f011971aca85bf3f713 100644
--- a/chrome/utility/importer/safari_importer.mm
+++ b/chrome/utility/importer/safari_importer.mm
@@ -294,7 +294,7 @@ void SafariImporter::ImportPasswords() {
   // Safari stores it's passwords in the Keychain, same as us so we don't need
   // to import them.
   // Note: that we don't automatically pick them up, there is some logic around
-  // the user needing to explicitly input his username in a page and blurring
+  // the user needing to explicitly input their username in a page and blurring
   // the field before we pick it up, but the details of that are beyond the
   // scope of this comment.
 }