Pass DomContentLoaded event from prerenders to launching elements.

chrome/browser/prerender/prerender_handle.cc

Index: chrome/browser/prerender/prerender_handle.cc
diff --git a/chrome/browser/prerender/prerender_handle.cc b/chrome/browser/prerender/prerender_handle.cc
index 31791dc00501648639608063f5d7f8b4c9a26181..4e02f448fa9f9446fc36f9c24e141b1419fd31e9 100644
--- a/chrome/browser/prerender/prerender_handle.cc
+++ b/chrome/browser/prerender/prerender_handle.cc
@@ -115,6 +115,15 @@ void PrerenderHandle::OnPrerenderStopLoading(
     observer_->OnPrerenderStopLoading(this);
 }
 
+void PrerenderHandle::OnPrerenderDomContentLoaded(
+    PrerenderContents* prerender_contents) {
+  DCHECK(CalledOnValidThread());
+  DCHECK(prerender_data_.get());
+  DCHECK_EQ(prerender_data_->contents(), prerender_contents);
+  if (observer_)
+    observer_->OnPrerenderDomContentLoaded(this);
+}
+
 void PrerenderHandle::OnPrerenderStop(PrerenderContents* prerender_contents) {
   DCHECK(CalledOnValidThread());
   if (observer_)