WebUI: Delete obsolete ShadowDOM v0 logic from polymer_browser_test_base.js

Bug: None
Change-Id: Ib7791d9a5a46f07d733c8926973cc45a797c2f33
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2587567
Commit-Queue: Rebekah Potter <rbpotter@chromium.org>
Auto-Submit: dpapad <dpapad@chromium.org>
Reviewed-by: Rebekah Potter <rbpotter@chromium.org>
Cr-Commit-Position: refs/heads/master@{#836893}

chrome/test/data/webui/polymer_browser_test_base.js

@@ -43,43 +43,6 @@ PolymerTest.prototype = {
     '//third_party/polymer/v1_0/components-chromium/iron-test-helpers/' +
         'mock-interactions.js',
   ],
-
-  /** @override */
-  setUp: function() {
-    testing.Test.prototype.setUp.call(this);
-
-    // List of imported URLs for debugging purposes.
-    PolymerTest.importUrls_ = [];
-    PolymerTest.scriptUrls_ = [];
-
-    // Importing a URL like "chrome://settings/foo" redirects to the base
-    // ("chrome://settings") page, which due to how browsePreload works can
-    // result in duplicate imports. Wrap document.registerElement so failures
-    // caused by re-registering Polymer elements are caught; otherwise Chrome
-    // simply throws "Script error" which is unhelpful.
-    var originalRegisterElement = document.registerElement;
-    document.registerElement = function() {
-      try {
-        return originalRegisterElement.apply(document, arguments);
-      } catch (e) {
-        var msg =
-            'If the call to document.registerElement failed because a type ' +
-            'is already registered, perhaps you have loaded a script twice. ' +
-            'Incorrect resource URLs can redirect to base WebUI pages; make ' +
-            'sure the following URLs are correct and unique:\n';
-        for (var i = 0; i < PolymerTest.importUrls_.length; i++) {
-          msg += '  ' + PolymerTest.importUrls_[i] + '\n';
-        }
-        for (var i = 0; i < PolymerTest.scriptUrls_.length; i++) {
-          msg += '  ' + PolymerTest.scriptUrls_[i] + '\n';
-        }
-        console.error(msg);
-
-        // Mocha will handle the error.
-        throw e;
-      }
-    };
-  },
 };
 
 /**
@@ -88,7 +51,6 @@ PolymerTest.prototype = {
  * @return {!Promise} A promise that is resolved/rejected on success/failure.
  */
 PolymerTest.importHtml = function(src) {
-  PolymerTest.importUrls_.push(src);
   var link = document.createElement('link');
   link.rel = 'import';
   var promise = new Promise(function(resolve, reject) {
@@ -100,23 +62,6 @@ PolymerTest.importHtml = function(src) {
   return promise;
 };
 
-/**
- * Loads the script file.
- * @param {string} src The URL to load.
- * @return {!Promise} A promise that is resolved/rejected on success/failure.
- */
-PolymerTest.loadScript = function(src) {
-  PolymerTest.scriptUrls_.push(src);
-  var script = document.createElement('script');
-  var promise = new Promise(function(resolve, reject) {
-    script.onload = resolve;
-    script.onerror = reject;
-  });
-  script.src = src;
-  document.head.appendChild(script);
-  return promise;
-};
-
 /**
  * Removes all content from the body. In a vulcanized build, this retains the
  * inlined tags so stylesheets and dom-modules are not discarded.