Measure the number of frame loads with Flash.

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index 7ce5ac24f15e3af3258d8dbdd18c69eaf6017762..bd901b0c563e9e8d9d8cf69ff48725ef50c64c1f 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -2746,6 +2746,7 @@ void WebContentsImpl::OnDidStartLoading(bool to_different_document) {
 
   loading_progresses_[render_frame_id] = kMinimumLoadingProgress;
   SendLoadProgressChanged();
+  RecordAction(base::UserMetricsAction("FrameLoad"));

[Charlie Reis, 2014/10/31 16:55:45]

DidStartLoading isn't the right place for this-- the navigation could fail.

I'm surprised if we don't have something like this already.  If not, we should
probably watch for it at commit time, similar to
NavigatorImpl::RecordNavigationMetrics.  I'm guessing you also don't want to
count in-page navigations, but I'm not sure.

[Lei Zhang, 2014/11/01 00:51:47]

FWIW, the PageLoad metric that's used as part of "NN foo per million page loads"
also doesn't care about failed navigation and navigation to anchors. But I agree
it's odd.

Successful, not in-page frame loads seem more accurate, so that's what I tried
to do.

 }
 
 void WebContentsImpl::OnDidStopLoading() {