Web UI: Remove Shadow DOM V0 usage in test

Bug: 940326
Change-Id: If92db06e743921e92cbe4da9965d854c401e1d00
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2342119Reviewed-by: dpapad <dpapad@chromium.org>
Commit-Queue: Rebekah Potter <rbpotter@chromium.org>
Cr-Commit-Position: refs/heads/master@{#795950}

chrome/test/data/webui/i18n_process_test.html

@@ -67,24 +67,6 @@ function testI18nProcess_ReRun() {
   assertTrue(document.body.hasAttribute('type'));
 }
 
-function testI18nProcess_ShadowRoot() {
-  var a = document.createElement('a');
-  var outerShadow = a.createShadowRoot();
-
-  var b = document.createElement('b');
-  outerShadow.appendChild(b);
-
-  var innerShadow = b.createShadowRoot();
-  var i = document.createElement('i');
-  i.setAttribute('i18n-content', 'content');
-  innerShadow.appendChild(i);
-
-  i18nTemplate.process(i, loadTimeData);
-
-  assertTrue(i.hasAttribute('i18n-processed'));
-  assertNotEqual('', i.textContent);
-}
-
 function testI18nProcess_Templates() {
   var outerDocFrag = document.querySelector('template').content;
   var innerDocFrag = outerDocFrag.querySelector('template').content;

chrome/test/data/webui/webui_resource_browsertest.cc

@@ -108,8 +108,6 @@ class WebUIResourceBrowserTestV0 : public WebUIResourceBrowserTest {
     // See crbug.com/911943 for detail.
     command_line->AppendSwitchASCII(switches::kEnableBlinkFeatures,
                                     "HTMLImports");
-    command_line->AppendSwitchASCII(switches::kEnableBlinkFeatures,
-                                    "ShadowDOMV0");
   }
 };