Isolate initiation counts for downloads to their own histograms and improve

content/browser/renderer_host/render_message_filter.cc

Index: content/browser/renderer_host/render_message_filter.cc
diff --git a/content/browser/renderer_host/render_message_filter.cc b/content/browser/renderer_host/render_message_filter.cc
index 6f1aa935197c04c3b048eb2a6f7eb65b62cd770e..dd69a390f96252be2a89941dc6bcb39b18a7ac2a 100644
--- a/content/browser/renderer_host/render_message_filter.cc
+++ b/content/browser/renderer_host/render_message_filter.cc
@@ -683,6 +683,7 @@ void RenderMessageFilter::OnDownloadUrl(const IPC::Message& message,
   scoped_ptr<net::URLRequest> request(
       new net::URLRequest(url, resource_dispatcher_host_));
   request->set_referrer(referrer.spec());
+  download_stats::RecordDownloadSource(download_stats::INITIATED_BY_RENDERER);
   resource_dispatcher_host_->BeginDownload(
       request.Pass(),
       false,
@@ -691,8 +692,6 @@ void RenderMessageFilter::OnDownloadUrl(const IPC::Message& message,
       render_process_id_,
       message.routing_id(),
       resource_context_);
-  download_stats::RecordDownloadCount(
-      download_stats::INITIATED_BY_RENDERER_COUNT);
 }
 
 void RenderMessageFilter::OnCheckNotificationPermission(