DevTools: Localize default snippet name in Source panel

Wrap a user facing string in ls so it's localizable.

Bug: 941561
Change-Id: If4285af49d7fd3ca8b2b7c2a447c35900e9efae5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1793748
Commit-Queue: Mandy Chen <mandy.chen@microsoft.com>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#697733}

third_party/blink/renderer/devtools/front_end/snippets/ScriptSnippetFileSystem.js

@@ -28,7 +28,7 @@ Snippets.SnippetFileSystem = class extends Persistence.PlatformFileSystem {
     const nextId = this._lastSnippetIdentifierSetting.get() + 1;
     this._lastSnippetIdentifierSetting.set(nextId);
 
-    const snippetName = `Script snippet #${nextId}`;
+    const snippetName = ls`Script snippet #${nextId}`;
     const snippets = this._snippetsSetting.get();
     snippets.push({name: snippetName, content: ''});
     this._snippetsSetting.set(snippets);

third_party/blink/renderer/devtools/front_end/snippets/snippets_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <grit-part>
+  <message name="IDS_DEVTOOLS_a8c377be97611cba090c400b4b54f753" desc="Default snippet name when a new snippet is created in the Sources panel">
+    Script snippet #<ph name="NEXTID">$1s<ex>1</ex></ph>
+  </message>
   <message name="IDS_DEVTOOLS_e0fe9b9cadde935642ad15a85c79d7b1" desc="Text in Snippets Quick Open of the Sources panel when opening snippets">
     No snippets found.
   </message>