Remove references to individual genders

Remove references to individual genders in comments/examples.  No
functional change.  For the rationale, cf.
https://chromium.googlesource.com/chromium/src/+/master/styleguide/gender_neutral_code.md

BUG=none
TEST=none

Change-Id: Ie4e07d5a6a7670f4c7054facf07b0ecda80f7115
Reviewed-on: https://chromium-review.googlesource.com/517086
Commit-Ready: Thiemo Nagel <tnagel@chromium.org>
Tested-by: Thiemo Nagel <tnagel@chromium.org>
Reviewed-by: Thiemo Nagel <tnagel@chromium.org>
Reviewed-by: David Zeuthen <zeuthen@chromium.org>
diff --git a/update_attempter.cc b/update_attempter.cc
index 4b7a294..ef07132 100644
--- a/update_attempter.cc
+++ b/update_attempter.cc
@@ -332,12 +332,11 @@
   bool use_p2p_for_downloading = false;
   bool use_p2p_for_sharing = false;
 
-  // Never use p2p for downloading in interactive checks unless the
-  // developer has opted in for it via a marker file.
+  // Never use p2p for downloading in interactive checks unless the developer
+  // has opted in for it via a marker file.
   //
-  // (Why would a developer want to opt in? If he's working on the
-  // update_engine or p2p codebases so he can actually test his
-  // code.).
+  // (Why would a developer want to opt in? If they are working on the
+  // update_engine or p2p codebases so they can actually test their code.)
 
   if (system_state_ != nullptr) {
     if (!system_state_->p2p_manager()->IsP2PEnabled()) {