Reland r251495: Re-enable prerender RemovingLink browser tests.

chrome/test/data/prerender/prerender_page_removes_pending.html

Index: chrome/test/data/prerender/prerender_page_removes_pending.html
diff --git a/chrome/test/data/prerender/prerender_page_removes_pending.html b/chrome/test/data/prerender/prerender_page_removes_pending.html
index ae70952f8bdd2633c6c43118727a90c233e3fd8d..296b1ee28d43d8ef8113332a1a63a6dd341f2ab3 100644
--- a/chrome/test/data/prerender/prerender_page_removes_pending.html
+++ b/chrome/test/data/prerender/prerender_page_removes_pending.html
@@ -17,14 +17,14 @@ function DidPrerenderPass() {
   var link = document.getElementById('thePrerender');
   if (link)
     link.parentElement.removeChild(link)
-  return !receivedPrerenderStartEvents[0] && !receivedPrerenderStopEvents[0];
+  return !GetPrerenderEventCount(0, 'webkitprerenderstart');
 }
 
 // Make sure DidPrerenderPass() was called first.  Otherwise, the page was
 // most likely reloaded instead of using the prerendered page.
 function DidDisplayPass() {
-  return pageWasPrerendered && !receivedPrerenderStartEvents[0] &&
-         !receivedPrerenderStopEvents[0];
+  return pageWasPrerendered &&
+      !GetPrerenderEventCount(0, 'webkitprerenderstart');
 }
 
 var link = document.getElementById('thePrerender');