[Not for review] record detailed time breakdown of SW related requests.

content/child/web_url_loader_impl.cc

Index: content/child/web_url_loader_impl.cc
diff --git a/content/child/web_url_loader_impl.cc b/content/child/web_url_loader_impl.cc
index d9eeca105e384e72e1f9bf865887f416954e8ada..61aaed5fcddf7f6f073d2ed3a0bed9f50295bb58 100644
--- a/content/child/web_url_loader_impl.cc
+++ b/content/child/web_url_loader_impl.cc
@@ -1054,6 +1054,7 @@ void WebURLLoaderImpl::PopulateURLResponse(const GURL& url,
                                            bool report_security_info) {
   response->setURL(url);
   response->setResponseTime(info.response_time.ToInternalValue());
+  response->setResponseStart(info.response_start.ToInternalValue());
   response->setMIMEType(WebString::fromUTF8(info.mime_type));
   response->setTextEncodingName(WebString::fromUTF8(info.charset));
   response->setExpectedContentLength(info.content_length);