Report page load timing information for child frames.

chrome/renderer/page_load_metrics/page_timing_metrics_sender.h

Index: chrome/renderer/page_load_metrics/page_timing_metrics_sender.h
diff --git a/chrome/renderer/page_load_metrics/page_timing_metrics_sender.h b/chrome/renderer/page_load_metrics/page_timing_metrics_sender.h
index fc3fba1f51412bc22ab5a8d28e099db496ea333b..75342f310678bd923296f18bc2a5836b8464240f 100644
--- a/chrome/renderer/page_load_metrics/page_timing_metrics_sender.h
+++ b/chrome/renderer/page_load_metrics/page_timing_metrics_sender.h
@@ -39,7 +39,7 @@ class PageTimingMetricsSender {
   base::Timer* timer() const { return timer_.get(); }
 
  private:
-  void EnsureSendTimer(int delay);
+  void EnsureSendTimer();
   void SendNow();
 
   IPC::Sender* const ipc_sender_;
@@ -51,6 +51,8 @@ class PageTimingMetricsSender {
   // scoped to a single committed load.
   PageLoadMetadata metadata_;
 
+  bool have_sent_ipc_ = false;
+
   DISALLOW_COPY_AND_ASSIGN(PageTimingMetricsSender);
 };