Use AreUsernamesSame for reused password accounts

When looking up signed-in non-syncing accounts,
AreEmailsSame is currently being used. However,
username may not be an email so it needs to be
canonicalized first. AreUsernamesSame does this.

Bug: 1023521
Change-Id: Iafe57b0e5accde34a61af6c84e3fdc5796bec4a7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1912644
Commit-Queue: Bettina Dea <bdea@chromium.org>
Reviewed-by: Daniel Rubery <drubery@chromium.org>
Cr-Commit-Position: refs/heads/master@{#714783}

chrome/browser/safe_browsing/chrome_password_protection_service.cc

@@ -1394,7 +1394,10 @@ AccountInfo ChromePasswordProtectionService::GetSignedInNonSyncAccount(
   auto account_iterator =
       std::find_if(signed_in_accounts.begin(), signed_in_accounts.end(),
                    [username](const auto& account) {
-                     return gaia::AreEmailsSame(account.email, username);
+                     return password_manager::AreUsernamesSame(
+                         account.email,
+                         /*is_username1_gaia_account=*/true, username,
+                         /*is_username2_gaia_account=*/true);
                    });
   if (account_iterator == signed_in_accounts.end())
     return AccountInfo();