[ServiceWorker] Update formatting for tests.

LayoutTests/http/tests/serviceworker/resources/response-content-worker.js

 importScripts('worker-testharness.js');
 importScripts('../../resources/testharness-helpers.js');
 
 promise_test(function() {
     var response = new Response('test string');
     assert_equals(
       response.headers.get('Content-Type'),
       'text/plain;charset=UTF-8',
       'A Response constructed with a string should have a Content-Type.');
     return response.text()
       .then(function(text) {
           assert_equals(text, 'test string',
-            'Response body text should match the string on construction.');
+                        'Response body text should match the string on ' +
+                        'construction.');
         });
   }, 'Behavior of Response with string content.');
 
 promise_test(function() {
     var intView = new Int32Array([0, 1, 2, 3, 4, 55, 6, 7, 8, 9]);
     var buffer = intView.buffer;
 
     var response = new Response(buffer);
     assert_false(response.headers.has('Content-Type'),
-      'A Response constructed with ArrayBuffer should not have a content type.');
+                 'A Response constructed with ArrayBuffer should not have a ' +
+                 'content type.');
     return response.arrayBuffer()
       .then(function(buffer) {
           var resultIntView = new Int32Array(buffer);
           assert_array_equals(
             resultIntView, [0, 1, 2, 3, 4, 55, 6, 7, 8, 9],
             'Response body ArrayBuffer should match ArrayBuffer ' +
             'it was constructed with.');
         });
   }, 'Behavior of Response with ArrayBuffer content.');
 
 promise_test(function() {
     var intView = new Int32Array([0, 1, 2, 3, 4, 55, 6, 7, 8, 9]);
 
     var response = new Response(intView);
     assert_false(response.headers.has('Content-Type'),
-      'A Response constructed with ArrayBufferView ' +
-      'should not have a content type.');
+                 'A Response constructed with ArrayBufferView ' +
+                 'should not have a content type.');
     return response.arrayBuffer()
       .then(function(buffer) {
           var resultIntView = new Int32Array(buffer);
           assert_array_equals(
             resultIntView, [0, 1, 2, 3, 4, 55, 6, 7, 8, 9],
             'Response body ArrayBuffer should match ArrayBufferView ' +
             'it was constructed with.');
         });
   }, 'Behavior of Response with ArrayBufferView content without a slice.');
 
 promise_test(function() {
     var intView = new Int32Array([0, 1, 2, 3, 4, 55, 6, 7, 8, 9]);
     var slice = intView.subarray(1, 4);  // Should be [1, 2, 3]
     var response = new Response(slice);
     assert_false(response.headers.has('Content-Type'),
-      'A Response constructed with ArrayBufferView ' +
-      'should not have a content type.');
+                 'A Response constructed with ArrayBufferView ' +
+                 'should not have a content type.');
     return response.arrayBuffer()
       .then(function(buffer) {
           var resultIntView = new Int32Array(buffer);
           assert_array_equals(
             resultIntView, [1, 2, 3],
             'Response body ArrayBuffer should match ArrayBufferView ' +
             'slice it was constructed with.');
         });
   }, 'Behavior of Response with ArrayBufferView content with a slice.');
 
 promise_test(function() {
     var headers = new Headers;
     headers.set('Content-Language', 'ja');
     var response = new Response(
       'test string', {method: 'GET', headers: headers});
     assert_false(response.bodyUsed,
-                 "bodyUsed is not set until Response is consumed.");
+                 'bodyUsed is not set until Response is consumed.');
     var response2 = response.clone();
     response.headers.set('Content-Language', 'en');
     var response3;
     assert_false(response2.bodyUsed,
-                 "bodyUsed should be false in clone of non-consumed Response.");
+                 'bodyUsed should be false in clone of non-consumed Response.');
     assert_equals(
       response2.headers.get('Content-Language'), 'ja', 'Headers of cloned ' +
       'response should not change when original response headers are changed.');
 
     return response.text()
       .then(function(text) {
           assert_true(
             response.bodyUsed,
-            "bodyUsed should be true after a response is consumed.");
+            'bodyUsed should be true after a response is consumed.');
           assert_false(
-            response2.bodyUsed, "bodyUsed should be false in Response cloned " +
-            "before the original response was consumed.");
+            response2.bodyUsed, 'bodyUsed should be false in Response cloned ' +
+            'before the original response was consumed.');
           response3 = response.clone();
           assert_true(response3.bodyUsed,
-                      "bodyUsed should be true in clone of consumed response.");
+                      'bodyUsed should be true in clone of consumed response.');
           return response2.text();
         })
       .then(function(text) {
           assert_equals(text, 'test string',
-            'Response clone response body text should match.');
+                        'Response clone response body text should match.');
         });
   }, 'Behavior of bodyUsed in Response and clone behavior.');