Merge revision 1301 changes:

- Add trace events for SendProcessMessage and off-screen rendering (issue #991).

git-svn-id: https://chromiumembedded.googlecode.com/svn/branches/1453@1302 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

cef3/libcef/renderer/browser_impl.cc

@@ -586,6 +586,10 @@ void CefBrowserImpl::OnRequest(const Cef_Request_Params& params) {
   std::string response;
   bool expect_response_ack = false;
 
+  TRACE_EVENT2("libcef", "CefBrowserImpl::OnRequest",
+               "request_id", params.request_id,
+               "expect_response", params.expect_response ? 1 : 0);
+
   if (params.user_initiated) {
     // Give the user a chance to handle the request.
     CefRefPtr<CefApp> app = CefContentClient::Get()->application();