Serialize original node when dragging a link instead of synthesizing HTML.

third_party/WebKit/LayoutTests/editing/pasteboard/drop-link.html

Index: third_party/WebKit/LayoutTests/editing/pasteboard/drop-link.html
diff --git a/third_party/WebKit/LayoutTests/editing/pasteboard/drop-link.html b/third_party/WebKit/LayoutTests/editing/pasteboard/drop-link.html
index e0cdad37f204d5165520e5547c6de9e9ddd20976..2388988d10a7a00ded08f69346ca60c6f26c1135 100644
--- a/third_party/WebKit/LayoutTests/editing/pasteboard/drop-link.html
+++ b/third_party/WebKit/LayoutTests/editing/pasteboard/drop-link.html
@@ -57,6 +57,9 @@ function dragLink(srcId, targetId)
 
     eventSender.mouseMoveTo(x, y);
     eventSender.mouseUp();
+
+    // Clear id on the cloned link created from the drag and drop.
+    delete document.querySelector("a[id]").removeAttribute('id');

[yosin_UTC9, 2016/04/06 01:17:29]

Why do we need to have delete-operator here? Node.removeAttribute() returns no
value.

[dcheng, 2016/04/06 01:20:33]

Oops, meant to delete the delete.

 }
 
 function verifier() {
@@ -92,11 +95,11 @@ function verifyLink(linkId, linkNumber)
         log("Link is " + anchors[linkNumber].href);
         var passed = true;
         if (anchors[linkNumber].href != originalTarget) {
-            log("Failure! Link targets differ");
+            log("Failure! Expected target: " + anchors[linkNumber].href + ", actual target: " + originalTarget);
             passed = false;
         }
         if (anchors[linkNumber].innerText != originalText) {
-            log("Failure! Link texts differ");
+            log("Failure! Expected text: " + anchors[linkNumber].innerText + ", actual text: " + originalText);
             passed = false;
         }
     }