[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-fallback-iframe.html b/LayoutTests/http/tests/serviceworker/resources/fetch-request-redirect-iframe.html
similarity index 61%
copy from LayoutTests/http/tests/serviceworker/resources/fetch-request-fallback-iframe.html
copy to LayoutTests/http/tests/serviceworker/resources/fetch-request-redirect-iframe.html
index 37c7c62ffaf38b0a906da928a56c054e04d9a873..ffd76bfc49908b9b25d10d5671c9ddb7095ea752 100644
--- a/LayoutTests/http/tests/serviceworker/resources/fetch-request-fallback-iframe.html
+++ b/LayoutTests/http/tests/serviceworker/resources/fetch-request-redirect-iframe.html
@@ -13,20 +13,23 @@ function xhr(url) {
     });
 }
 
-function load_image(url, cross_origin) {
+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();
-      };
-      if (cross_origin != '') {
-        img.crossOrigin = cross_origin;
-      }
+      img.onload = resolve;
+      img.onerror = 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 = resolve;
+      audio.onerror = reject;
+      audio.src = url;
+    });
+}
 </script>