Files app: Fix FileManagerUITest to work without DOMv0 and native HTML Imports

Removed the files_password_dialog which was failing to import its
dependencies and isn't needed for these tests.

Bug: 924873, 1111393
Change-Id: I677db6d25ce1f6701e1b6dbe7e40081b8987b7d6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2362362
Commit-Queue: Joel Hockey <joelhockey@chromium.org>
Auto-Submit: Luciano Pacheco <lucmult@chromium.org>
Reviewed-by: Joel Hockey <joelhockey@chromium.org>
Cr-Commit-Position: refs/heads/master@{#799520}

chrome/browser/chromeos/file_manager/file_manager_uitest.cc

@@ -23,13 +23,6 @@ class FileManagerUITest : public InProcessBrowserTest {
     // --disable-web-security required to load resources from
     // files and from chrome://resources/... urls.
     command_line->AppendSwitch(switches::kDisableWebSecurity);
-
-    // TODO(yoichio): This is temporary switch to support chrome internal
-    // components migration from the old web APIs.
-    // After completion of the migration, we should remove this.
-    // See crbug.com/924873 for detail.
-    command_line->AppendSwitchASCII(switches::kDisableBlinkFeatures,
-                                    "ShadowDOMV0,CustomElementsV0,HTMLImports");
   }
 
   void RunTest(std::string test_scope) {

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

@@ -212,6 +212,7 @@ for filename, substitutions in (
     ('foreground/js/elements_importer.js', (
         ("= 'foreground", "= 'test/gen/foreground"),
     )),
+    ('foreground/elements/files_password_dialog.html', ()),
     ('foreground/elements/files_format_dialog.html', ()),
     ('foreground/elements/files_icon_button.html', ()),
     ('foreground/elements/files_message.html', ()),