Fix typos in custom element + imports layout tests

These tests are currently disabled by TestExpectation
for failing, but will be enabled again in the following CLs.

BUG=594918

Review-Url: https://codereview.chromium.org/2279693002
Cr-Commit-Position: refs/heads/master@{#414360}

third_party/WebKit/LayoutTests/custom-elements/imports/resources/create-element.html

@@ -31,7 +31,7 @@ test(() => {
   // new MyElement() should synchronously call constructor.
   let c = new MyElement();
   assert_equals(c.ownerDocument, document);
-  assert_equals(constructors.length, e);
+  assert_equals(constructors.length, 3);
 
   assert_array_equals(constructors, [a, b, c]);
 }, 'createElement() and new MyElement should work in imported document.');

third_party/WebKit/LayoutTests/custom-elements/imports/sync-create-element-order.html

@@ -34,10 +34,10 @@ import1.href = 'resources/import-custom.html';
 
 // TODO(kochi): crbug.com/640465 synchronous creation fails in imports.
 import1.onload = test.step_func_done(() => {
-  let elementsInMaster = document.querySelector('x-x');
-  let elementsInImport = import1.import.querySelector('x-x');
+  let elementInMaster = document.querySelector('x-x');
+  let elementInImport = import1.import.querySelector('x-x');
 
-  assert_array_equals(reactions, [elementsInMaster, elementsInImport],
+  assert_array_equals(reactions, [elementInMaster, elementInImport],
                       'Constructor should run in the order elements are created');
 });