Print Preview Componentization: Migrate header footer tests

Add a HeaderFooter test to verify that the header footer option appears
and disappears correctly for different margin and paper size settings.
Migrated from tests in print_preview_tests.js.

Bug: 814860
Change-Id: I18012eb26ccd261b94a88f70ef24746e872910ba
Reviewed-on: https://chromium-review.googlesource.com/1013301
Commit-Queue: Rebekah Potter <rbpotter@chromium.org>
Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Cr-Commit-Position: refs/heads/master@{#551780}

chrome/test/data/webui/print_preview/new_print_preview_ui_browsertest.js

@@ -97,6 +97,10 @@ TEST_F('PrintPreviewSettingsSectionsTest', 'Other', function() {
   this.runMochaTest(settings_sections_tests.TestNames.Other);
 });
 
+TEST_F('PrintPreviewSettingsSectionsTest', 'HeaderFooter', function() {
+  this.runMochaTest(settings_sections_tests.TestNames.HeaderFooter);
+});
+
 TEST_F('PrintPreviewSettingsSectionsTest', 'SetPages', function() {
   this.runMochaTest(settings_sections_tests.TestNames.SetPages);
 });