Revert of [Page Load Metrics] PageLoadMetrics Mojofication.

chrome/renderer/page_load_metrics/metrics_render_frame_observer.h

Index: chrome/renderer/page_load_metrics/metrics_render_frame_observer.h
diff --git a/chrome/renderer/page_load_metrics/metrics_render_frame_observer.h b/chrome/renderer/page_load_metrics/metrics_render_frame_observer.h
index 78b8b3f962e21a2aada2511822fc5ec75daed960..12429692faa194a6ff1c690068c10601a097ae39 100644
--- a/chrome/renderer/page_load_metrics/metrics_render_frame_observer.h
+++ b/chrome/renderer/page_load_metrics/metrics_render_frame_observer.h
@@ -19,7 +19,6 @@
 namespace page_load_metrics {
 
 class PageTimingMetricsSender;
-class PageTimingSender;
 
 // MetricsRenderFrameObserver observes RenderFrame notifications, and sends page
 // load timing information to the browser process over IPC. A
@@ -44,15 +43,14 @@
   void FrameDetached() override;
 
  private:
+  // Will be null when we're not actively sending metrics.
+  std::unique_ptr<PageTimingMetricsSender> page_timing_metrics_sender_;
+
   void SendMetrics();
   virtual bool ShouldSendMetrics() const;
   virtual mojom::PageLoadTimingPtr GetTiming() const;
   virtual std::unique_ptr<base::Timer> CreateTimer() const;
-  virtual std::unique_ptr<PageTimingSender> CreatePageTimingSender();
   virtual bool HasNoRenderFrame() const;
-
-  // Will be null when we're not actively sending metrics.
-  std::unique_ptr<PageTimingMetricsSender> page_timing_metrics_sender_;
 
   DISALLOW_COPY_AND_ASSIGN(MetricsRenderFrameObserver);
 };