[filelist] Fill files-ng list check SVG icon

The list check icon should be filled with Blue 600 #1A73E8. Add it to
the files-ng 20px icon set. Minor fix: close the <g> tag on external-
link item in the icon set.

Bug: 1002393, 992821
Change-Id: Ic5bee0a90c1fdcfb8eb9b6c424c00001c8bb8f0d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1918791Reviewed-by: Luciano Pacheco <lucmult@chromium.org>
Reviewed-by: Alex Danilo <adanilo@chromium.org>
Commit-Queue: Noel Gordon <noel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#715602}

ui/file_manager/file_manager/foreground/elements/icons.html

@@ -43,7 +43,8 @@
     <defs>
       <!-- ui -->
       <g id="eject"><path d="M15 12v2H5v-2h10zm-5-8l5 6H5l5-6z"/></g>
-      <g id="external-link"><path d="M15 15H5V5h4V3H5C4 3 3 4 3 5v10c0 1 1 2 2 2h10c1 0 2-1 2-2v-4h-2v4zM11 3v2h2.5L7 11.5 8.5 13 15 6.5V9h2V3h-6z"/><g>
+      <g id="external-link"><path d="M15 15H5V5h4V3H5C4 3 3 4 3 5v10c0 1 1 2 2 2h10c1 0 2-1 2-2v-4h-2v4zM11 3v2h2.5L7 11.5 8.5 13 15 6.5V9h2V3h-6z"/></g>
+      <g id="list-check"><path fill="#1A73E8" d="M10 1c4.9706 0 9 4.0294 9 9s-4.0294 9-9 9-9-4.0294-9-9 4.0294-9 9-9zm4.1705 5.9545c-.4393-.4393-1.1517-.4393-1.591 0L8.875 10.659 7.4205 9.2045c-.4393-.4393-1.1517-.4393-1.591 0s-.4393 1.1517 0 1.591l2.25 2.25c.4393.4393 1.1517.4393 1.591 0l4.5-4.5c.4393-.4393.4393-1.1517 0-1.591z"/></g>
       <!-- filetype -->
       <g id="archive"><path d="M15 3a2 2 0 012 2v10a2 2 0 01-2 2H5a2 2 0 01-2-2V5c0-1.1.9-2 2-2zM8 5H5v10h10V5h-5v2H8V5zm4 6v2h-2v-2h2zm-2-2v2H8V9h2zm2-2v2h-2V7h2z"/></g>
       <g id="audio"><path fill="#EA4335" d="M16 15a1 1 0 01-1 1h-1v-3h2v2zM6 16H5a1 1 0 01-1-1v-2h2v3zM2 9v6a3 3 0 003 3h3v-7H4V9c0-3.87 2.13-5 6-5s6 1.13 6 5v2h-4v7h3a3 3 0 003-3V9c0-4.97-3.03-7-8-7-4.97 0-8 2.03-8 7z"/></g>

ui/file_manager/file_manager/foreground/images/files/ui/list_check.svg

 <svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 20 20">
-  <path d="M10 1c4.9706 0 9 4.0294 9 9s-4.0294 9-9 9-9-4.0294-9-9 4.0294-9 9-9zm4.1705 5.9545c-.4393-.4393-1.1517-.4393-1.591 0L8.875 10.659 7.4205 9.2045c-.4393-.4393-1.1517-.4393-1.591 0s-.4393 1.1517 0 1.591l2.25 2.25c.4393.4393 1.1517.4393 1.591 0l4.5-4.5c.4393-.4393.4393-1.1517 0-1.591z"/>
+  <path fill="#1A73E8" d="M10 1c4.9706 0 9 4.0294 9 9s-4.0294 9-9 9-9-4.0294-9-9 4.0294-9 9-9zm4.1705 5.9545c-.4393-.4393-1.1517-.4393-1.591 0L8.875 10.659 7.4205 9.2045c-.4393-.4393-1.1517-.4393-1.591 0s-.4393 1.1517 0 1.591l2.25 2.25c.4393.4393 1.1517.4393 1.591 0l4.5-4.5c.4393-.4393.4393-1.1517 0-1.591z"/>
 </svg>