Stop rewriting html entrypoints

This adds the necessary ES imports to the various entrypoints to
properly load their dependencies. This means that we can stop rewriting
the HTML entrypoints and simply copy them over to the build directory.

Bug: 1046596
Change-Id: If1182ed051a22cc2bb0c77456456ab039f63cec2
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2035791
Commit-Queue: Tim van der Lippe <[email protected]>
Reviewed-by: Paul Lewis <[email protected]>
diff --git a/front_end/node_app.js b/front_end/node_app.js
index 1125741..4002463 100644
--- a/front_end/node_app.js
+++ b/front_end/node_app.js
@@ -1,5 +1,6 @@
 // Copyright 2018 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
+import './shell.js';
 
 Root.Runtime.startApplication('node_app');