[3/3 blink] Support redirect option of Request and "opaqueredirect" response type.

LayoutTests/http/tests/serviceworker/resources/fetch-request-redirect-iframe.html

Index: LayoutTests/http/tests/serviceworker/resources/fetch-request-redirect-iframe.html
diff --git a/LayoutTests/http/tests/serviceworker/resources/fetch-request-redirect-iframe.html b/LayoutTests/http/tests/serviceworker/resources/fetch-request-redirect-iframe.html
new file mode 100644
index 0000000000000000000000000000000000000000..95e191f22a4954682cbdc60fa21ab4f05a594dc2
--- /dev/null
+++ b/LayoutTests/http/tests/serviceworker/resources/fetch-request-redirect-iframe.html
@@ -0,0 +1,35 @@
+<script>
+function xhr(url) {
+  return new Promise(function(resolve, reject) {
+      var request = new XMLHttpRequest();
+      request.addEventListener(
+        'error',
+        function(event) { reject(event); });
+      request.addEventListener(
+        'load',
+        function(event) { resolve(request.response); });
+      request.open('GET', url);
+      request.send();
+    });
+}
+
+function load_image(url) {
+  return new Promise(function(resolve, reject) {
+      var img = document.createElement('img');
+      document.body.appendChild(img);
+      img.onload = function() { resolve(); };
+      img.onerror = function() { reject(); };
+      img.src = url;
+    });
+}
+
+function load_audio(url) {
+  return new Promise(function(resolve, reject) {
+      var audio = document.createElement('audio');
+      document.body.appendChild(audio);
+      audio.oncanplay = function() { resolve(); };
+      audio.onerror = function() { reject(); };
+      audio.src = url;
+    });
+}
+</script>