Cancel asynchronously in allClientsAndObserversRemoved() for Raw type

third_party/WebKit/LayoutTests/http/tests/cache/cancel-multiple-post-xhrs.html

Index: third_party/WebKit/LayoutTests/http/tests/cache/cancel-multiple-post-xhrs.html
diff --git a/third_party/WebKit/LayoutTests/http/tests/cache/cancel-multiple-post-xhrs.html b/third_party/WebKit/LayoutTests/http/tests/cache/cancel-multiple-post-xhrs.html
index f14b2d4d297b4d6df7a00a2c27f3dec52d1865c0..204c085e6486d35a99731f47417e7308d8c61271 100644
--- a/third_party/WebKit/LayoutTests/http/tests/cache/cancel-multiple-post-xhrs.html
+++ b/third_party/WebKit/LayoutTests/http/tests/cache/cancel-multiple-post-xhrs.html
@@ -2,6 +2,7 @@
 <script>
 if (window.testRunner) {
     testRunner.dumpAsText();
+    testRunner.waitUntilDone();
     testRunner.dumpResourceLoadCallbacks();
 }
 
@@ -14,5 +15,11 @@ for (var i = 0; i < 3; i++) {
 
 for (var i = 0; i < 3; i++)
     xhrs[i].abort();
+
+if (window.testRunner) {
+    // We wait for XHRs to be cancelled and log messages to be output because
+    // XHRs are cancelled asynchronously.
+    setTimeout(function() { testRunner.notifyDone(); }, 0);
+}
 </script>
 </body>