Adding ArrayBuffer support to ServiceWorker Response and tests

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

+importScripts('worker-test-harness.js');
+
+promise_test(function() {
+  var response = new Response('test string');

[horo, 2014/09/09 01:38:50]

+2 indent
http://www.chromium.org/blink/serviceworker/testing#TOC-Wrapping-and-Indentation
promise_test(function() {
    var response = new Response('test string');
    // ...
  }, 'Behavior of Response with string content.');

[dmurph, 2014/09/09 19:06:02]

Done.

+  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.body.asText()
+    .then(function(text) {
+      assert_equals(text, 'test string',

[horo, 2014/09/09 01:38:50]

+2 indent

  return response.body.asText()
    .then(function(text) {
        assert_equals(text, 'test string',
          'Response body text should match the string on construction.');
      });

[dmurph, 2014/09/09 19:06:02]

Done.

+        '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]);

[horo, 2014/09/09 01:38:50]

ditto

[dmurph, 2014/09/09 19:06:02]

Done.

+  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.');
+  return response.body.asArrayBuffer()
+    .then(function(buffer) {
+      var resultIntView = new Int32Array(buffer);

[horo, 2014/09/09 01:38:50]

ditto

[dmurph, 2014/09/09 19:06:02]

Done.

+      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.');