Revert of [XMLHttpRequest] Stop throwing for network error in async mode

LayoutTests/fast/files/resources/apply-blob-url-to-xhr.js

Index: LayoutTests/fast/files/resources/apply-blob-url-to-xhr.js
diff --git a/LayoutTests/fast/files/resources/apply-blob-url-to-xhr.js b/LayoutTests/fast/files/resources/apply-blob-url-to-xhr.js
deleted file mode 100644
index 463704be76b1f352b2e914b0e2d2bf5420a2a5ec..0000000000000000000000000000000000000000
--- a/LayoutTests/fast/files/resources/apply-blob-url-to-xhr.js
+++ /dev/null
@@ -1,97 +0,0 @@
-function log(message)
-{
-    if (self.importScripts) {
-        postMessage(message);
-    } else {
-        document.getElementById('console').appendChild(document.createTextNode(message + "\n"));
-    }
-}
-
-var uuidRegex = new RegExp('[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}');
-
-function replaceUUID(s)
-{
-    return s.replace(uuidRegex, 'UUID');
-}
-
-function sendXMLHttpRequestSync(method, url)
-{
-    var xhr = new XMLHttpRequest();
-    xhr.open(method, url, false);
-    try {
-        xhr.send();
-        log("Status: " + xhr.status);
-        log("Response: " + xhr.responseText);
-    } catch (error) {
-        log("Received exception, code: " + error.code + ", name: " + error.name + ", message: " + replaceUUID(error.message));
-    }
-}
-
-function sendXMLHttpRequestAsync(method, url)
-{
-    return new Promise(function (resolve) {
-        var xhr = new XMLHttpRequest();
-
-        xhr.onload = function()
-        {
-            log("Status: " + xhr.status);
-            log("Response: " + xhr.responseText);
-        };
-        xhr.onerror = function()
-        {
-            log("Error event is dispatched");
-        };
-        xhr.onloadend = function()
-        {
-            resolve();
-        };
-
-        xhr.open(method, url, true);
-        try {
-            xhr.send();
-        } catch (error) {
-            log("Received exception, code: " + error.code + ", name: " + error.name + ", message: " + replaceUUID(error.message));
-        }
-    });
-}
-
-function runXHRs(file)
-{
-    var fileURL = URL.createObjectURL(file);
-
-    log("Test that sync XMLHttpRequest GET succeeds.");
-    sendXMLHttpRequestSync("GET", fileURL);
-
-    log("Test that sync XMLHttpRequest POST fails.");
-    sendXMLHttpRequestSync("POST", fileURL);
-
-    log("Test that sync XMLHttpRequest GET fails after the blob URL is revoked.");
-    URL.revokeObjectURL(fileURL);
-    sendXMLHttpRequestSync("GET", fileURL);
-
-    fileURL = URL.createObjectURL(file);
-
-    log("Test that async XMLHttpRequest GET succeeds.");
-    sendXMLHttpRequestAsync("GET", fileURL).then(function()
-    {
-        log("Test that async XMLHttpRequest POST fails.");
-        return sendXMLHttpRequestAsync("POST", fileURL);
-    }).then(function()
-    {
-        log("Test that async XMLHttpRequest GET fails after the blob URL is revoked.");
-        URL.revokeObjectURL(fileURL);
-        return sendXMLHttpRequestAsync("GET", fileURL);
-    }).then(function()
-    {
-        log("DONE");
-        if (!self.importScripts && testRunner.notifyDone)
-            testRunner.notifyDone();
-    });
-}
-
-if (self.importScripts) {
-    onmessage = function(event)
-    {
-        runXHRs(event.data);
-    };
-}