Implement AddLocalizedStringsBulk() variant that takes a span.

This makes calling AddLocalizedStringsBulk() even easier and less error
prone. Update a few callers to demonstrate this.

Change-Id: Ie23e385de7062d17034ea73d5fcd51efadedf1fa
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1927573
Commit-Queue: Lei Zhang <[email protected]>
Reviewed-by: Rebekah Potter <[email protected]>
Cr-Commit-Position: refs/heads/master@{#717466}
diff --git a/chrome/browser/ui/webui/policy_ui.cc b/chrome/browser/ui/webui/policy_ui.cc
index 81efd814..eeb2e20b 100644
--- a/chrome/browser/ui/webui/policy_ui.cc
+++ b/chrome/browser/ui/webui/policy_ui.cc
@@ -69,7 +69,7 @@
       {"statusMachine", IDS_POLICY_STATUS_MACHINE},
       {"statusUser", IDS_POLICY_STATUS_USER},
   };
-  AddLocalizedStringsBulk(source, kStrings, base::size(kStrings));
+  AddLocalizedStringsBulk(source, kStrings);
 
   source->AddResourcePath("policy.css", IDR_POLICY_CSS);
   source->AddResourcePath("policy_base.js", IDR_POLICY_BASE_JS);