Remove gender specific language from src/tools BUG=542537 Review-Url: https://chromiumcodereview.appspot.com/2441523003 Cr-Original-Commit-Position: refs/heads/master@{#426658} Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src Cr-Mirrored-Commit: 337f2010bdd1d89b11c8913e1b3d652092d59db4