Fix quick-view path

Bug: 813477
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: Iba58be17fcb5b5150677c535f5affd43d3b452c9
Reviewed-on: https://chromium-review.googlesource.com/1096932Reviewed-by: Alexey Baskakov <loyso@chromium.org>
Commit-Queue: Joel Hockey <joelhockey@chromium.org>
Cr-Commit-Position: refs/heads/master@{#566663}

ui/file_manager/file_manager/test/scripts/create_test_main.py

@@ -183,6 +183,7 @@ for filename, substitutions in (
     )),
     ('elements/files_safe_media.html', (('webview', 'iframe'),)),
     ('elements/files_safe_media.js', (
+        ("'foreground/elements", "'%sforeground/elements" % ROOT),
         ("'webview'", "'iframe'"),
         ("'contentload'", "'load'"),
         ('this.webview_.contentWindow.postMessage(data, FILES_APP_ORIGIN);',