Remove unnecessary HTML imports from download-internals.

Specifically:
 - Remove dependencies to cr.ui.List, cr.ui.ListItem and list.css
   since these were (erroneously?) added at r508574, but were not used.
 - Hook up closure_compile target, since it was not referenced from anywhere.
 - Replace remaining HTML imports with regular <script> tags instead.

Bug: 937747
Change-Id: Ib26d4a31ecb365e23205f28d21d18a79ce03aa52
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1809110Reviewed-by: Michael Giuffrida <michaelpg@chromium.org>
Commit-Queue: Demetrios Papadopoulos <dpapad@chromium.org>
Cr-Commit-Position: refs/heads/master@{#697668}

chrome/browser/resources/BUILD.gn

@@ -19,6 +19,7 @@ if (closure_compile) {
         "bluetooth_internals:closure_compile",
         "bookmarks:closure_compile",
         "discards:closure_compile",
+        "download_internals:closure_compile",
         "downloads:closure_compile",
         "history:closure_compile",
         "local_ntp:closure_compile",

chrome/browser/resources/download_internals/BUILD.gn

@@ -15,6 +15,7 @@ js_type_check("closure_compile") {
 js_library("download_internals") {
   deps = [
     ":download_internals_browser_proxy",
+    "//third_party/jstemplate:jstemplate",
     "//ui/webui/resources/js:assert",
     "//ui/webui/resources/js:cr",
     "//ui/webui/resources/js:util",

chrome/browser/resources/download_internals/download_internals.html

@@ -4,14 +4,12 @@
     <meta charset="utf-8">
     <title>Download Internals</title>
     <meta name="viewport" content="width=device-width">
-    <link rel="stylesheet" href="chrome://resources/css/list.css">
     <link rel="stylesheet" href="chrome://resources/css/text_defaults.css">
     <link rel="stylesheet" href="download_internals.css">
 
-    <link rel="import" href="chrome://resources/html/cr.html">
-    <link rel="import" href="chrome://resources/html/cr/ui/list_item.html">
-    <link rel="import" href="chrome://resources/html/cr/ui/list.html">
-    <link rel="import" href="chrome://resources/html/util.html">
+    <script src="chrome://resources/js/promise_resolver.js"></script>
+    <script src="chrome://resources/js/cr.js"></script>
+    <script src="chrome://resources/js/util.js"></script>
 
     <script src="download_internals_browser_proxy.js"></script>
     <script src="download_internals.js"></script>