Consistently use single quotes in Background Fetch WPTs.

TBR=peter@chromium.org

Change-Id: I57ea9fbf394491f31a5c319b82d6eccf7f0cf4e2
Reviewed-on: https://chromium-review.googlesource.com/1216344Reviewed-by: Rayan Kanso <rayankans@chromium.org>
Commit-Queue: Rayan Kanso <rayankans@chromium.org>
Cr-Commit-Position: refs/heads/master@{#589931}

third_party/WebKit/LayoutTests/external/wpt/background-fetch/fetch.https.window.js

@@ -73,8 +73,8 @@ backgroundFetchTest(async (test, backgroundFetch) => {
   assert_equals(registration.uploadTotal, 0);
   assert_equals(registration.uploaded, 0);
   assert_equals(registration.downloadTotal, 0);
-  assert_equals(registration.state, "pending");
-  assert_equals(registration.failureReason, "");
+  assert_equals(registration.state, 'pending');
+  assert_equals(registration.failureReason, '');
   // Skip `downloaded`, as the transfer may have started already.
 
   const {type, eventRegistration, results} = await getMessageFromServiceWorker();
@@ -82,8 +82,8 @@ backgroundFetchTest(async (test, backgroundFetch) => {
   assert_equals(results.length, 1);
 
   assert_equals(eventRegistration.id, registration.id);
-  assert_equals(eventRegistration.state, "success");
-  assert_equals(eventRegistration.failureReason, "");
+  assert_equals(eventRegistration.state, 'success');
+  assert_equals(eventRegistration.failureReason, '');
 
   assert_true(results[0].url.includes('resources/feature-name.txt'));
   assert_equals(results[0].status, 200);
@@ -97,7 +97,7 @@ backgroundFetchTest(async (test, backgroundFetch) => {
   // Very large download total that will definitely exceed the quota.
   const options = {downloadTotal: Number.MAX_SAFE_INTEGER};
   await promise_rejects(
-      test, "QUOTA_EXCEEDED_ERR",
+      test, 'QUOTA_EXCEEDED_ERR',
       backgroundFetch.fetch(registrationId, 'resources/feature-name.txt', options),
       'This fetch should have thrown a quota exceeded error');
 
@@ -112,8 +112,8 @@ backgroundFetchTest(async (test, backgroundFetch) => {
   assert_equals(results.length, 2);
 
   assert_equals(eventRegistration.id, registration.id);
-  assert_equals(eventRegistration.state, "success");
-  assert_equals(eventRegistration.failureReason, "");
+  assert_equals(eventRegistration.state, 'success');
+  assert_equals(eventRegistration.failureReason, '');
 
   for (const result of results) {
     assert_true(result.url.includes('resources/feature-name.txt'));

third_party/WebKit/LayoutTests/external/wpt/background-fetch/get.https.window.js

@@ -41,8 +41,8 @@ backgroundFetchTest(async (test, backgroundFetch) => {
   assert_equals(registration.uploadTotal, 0);
   assert_equals(registration.uploaded, 0);
   assert_equals(registration.downloadTotal, 1234);
-  assert_equals(registration.state, "pending");
-  assert_equals(registration.failureReason, "");
+  assert_equals(registration.state, 'pending');
+  assert_equals(registration.failureReason, '');
   // Skip `downloaded`, as the transfer may have started already.
 
   const secondRegistration = await backgroundFetch.get(registrationId);