Pass DomContentLoaded event from prerenders to launching elements.

chrome/browser/prerender/prerender_contents.cc

Index: chrome/browser/prerender/prerender_contents.cc
diff --git a/chrome/browser/prerender/prerender_contents.cc b/chrome/browser/prerender/prerender_contents.cc
index 827eda425a086f5ba2215ea54fb1d99627b68a01..a8ab8d9fef01e924b9ea0dd446d3c5204895a1bf 100644
--- a/chrome/browser/prerender/prerender_contents.cc
+++ b/chrome/browser/prerender/prerender_contents.cc
@@ -185,6 +185,10 @@ void PrerenderContents::Observer::OnPrerenderStopLoading(
     PrerenderContents* contents) {
 }
 
+void PrerenderContents::Observer::OnPrerenderDomContentLoaded(
+    PrerenderContents* contents) {
+}
+
 void PrerenderContents::Observer::OnPrerenderCreatedMatchCompleteReplacement(
     PrerenderContents* contents, PrerenderContents* replacement) {
 }
@@ -485,6 +489,11 @@ void PrerenderContents::NotifyPrerenderStopLoading() {
   FOR_EACH_OBSERVER(Observer, observer_list_, OnPrerenderStopLoading(this));
 }
 
+void PrerenderContents::NotifyPrerenderDomContentLoaded() {
+  FOR_EACH_OBSERVER(Observer, observer_list_,
+                    OnPrerenderDomContentLoaded(this));
+}
+
 void PrerenderContents::NotifyPrerenderStop() {
   DCHECK_NE(FINAL_STATUS_MAX, final_status_);
   FOR_EACH_OBSERVER(Observer, observer_list_, OnPrerenderStop(this));
@@ -586,6 +595,12 @@ void PrerenderContents::DidStopLoading(
   NotifyPrerenderStopLoading();
 }
 
+void PrerenderContents::DocumentLoadedInFrame(
+    int64 frame_id,
+    RenderViewHost* render_view_host) {
+  NotifyPrerenderDomContentLoaded();

[davidben, 2014/02/10 18:22:07]

Won't this fire for every frame? I expect you want to limit this to just the
main frame. Looks like chrome/browser/guestview/webview/webview_guest.cc saves
the main frame's ID on DidCommitProvisionalLoadForFrame.

[ksimbili, 2014/02/11 01:03:58]

Done.

+}
+
 void PrerenderContents::DidStartProvisionalLoadForFrame(
     int64 frame_id,
     int64 parent_frame_id,