Make some code gender neutral.

chrome/common/extensions/api/platform_keys.idl

Index: chrome/common/extensions/api/platform_keys.idl
diff --git a/chrome/common/extensions/api/platform_keys.idl b/chrome/common/extensions/api/platform_keys.idl
index dc875fc5f1a5607835d9423efe179c3d067a8fcb..b184c7b474ed6e7bfee9bd1f474122f433944a35 100644
--- a/chrome/common/extensions/api/platform_keys.idl
+++ b/chrome/common/extensions/api/platform_keys.idl
@@ -107,7 +107,7 @@ namespace platformKeys {
     // are known to the platform, match <code>request</code> and for which the
     // extension has permission to access the certificate and its private key.
     // If <code>interactive</code> is true, the user is presented a dialog where
-    // he can select from matching certificates and grant the extension access
+    // they can select from matching certificates and grant the extension access
     // to the certificate.
     // The selected/filtered client certificates will be passed to
     // <code>callback</code>.