[Page Load Metrics] Add mojom file to page load metrics.

chrome/renderer/page_load_metrics/page_timing_metrics_sender.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_RENDERER_PAGE_LOAD_METRICS_PAGE_TIMING_METRICS_SENDER_H_
 #define CHROME_RENDERER_PAGE_LOAD_METRICS_PAGE_TIMING_METRICS_SENDER_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 11 matching lines @@
 namespace page_load_metrics {
 
 // PageTimingMetricsSender is responsible for sending page load timing metrics
 // over IPC. PageTimingMetricsSender may coalesce sent IPCs in order to
 // minimize IPC contention.
 class PageTimingMetricsSender {
  public:
   PageTimingMetricsSender(IPC::Sender* ipc_sender,
                           int routing_id,
                           std::unique_ptr<base::Timer> timer,
-                          const PageLoadTiming& initial_timing);
+                          mojo::StructPtr<PageLoadTiming> initial_timing);
   ~PageTimingMetricsSender();
 
   void DidObserveLoadingBehavior(blink::WebLoadingBehaviorFlag behavior);
-  void Send(const PageLoadTiming& timing);
+  void Send(mojo::StructPtr<PageLoadTiming> timing);
 
  protected:
   base::Timer* timer() const { return timer_.get(); }
 
  private:
   void EnsureSendTimer(int delay);
   void SendNow();
 
   IPC::Sender* const ipc_sender_;
   const int routing_id_;
   std::unique_ptr<base::Timer> timer_;
-  PageLoadTiming last_timing_;
+  mojo::StructPtr<PageLoadTiming> last_timing_;
 
   // The the sender keep track of metadata as it comes in, because the sender is
   // scoped to a single committed load.
   PageLoadMetadata metadata_;
 
   DISALLOW_COPY_AND_ASSIGN(PageTimingMetricsSender);
 };
 
 }  // namespace page_load_metrics
 
 #endif  // CHROME_RENDERER_PAGE_LOAD_METRICS_PAGE_TIMING_METRICS_SENDER_H_