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

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..3faf59e62323b77be65d882e27ce2cb305c634c3 100644
--- a/chrome/renderer/page_load_metrics/page_timing_metrics_sender.h
+++ b/chrome/renderer/page_load_metrics/page_timing_metrics_sender.h
@@ -26,14 +26,15 @@ namespace page_load_metrics {
 // minimize IPC contention.
 class PageTimingMetricsSender {
  public:
-  PageTimingMetricsSender(IPC::Sender* ipc_sender,
-                          int routing_id,
-                          std::unique_ptr<base::Timer> timer,
-                          const PageLoadTiming& initial_timing);
+  PageTimingMetricsSender(
+      IPC::Sender* ipc_sender,
+      int routing_id,
+      std::unique_ptr<base::Timer> timer,
+      mojo::StructPtr<mojom::PageLoadTiming> initial_timing);
   ~PageTimingMetricsSender();
 
   void DidObserveLoadingBehavior(blink::WebLoadingBehaviorFlag behavior);
-  void Send(const PageLoadTiming& timing);
+  void Send(mojo::StructPtr<mojom::PageLoadTiming> timing);
 
  protected:
   base::Timer* timer() const { return timer_.get(); }
@@ -45,11 +46,11 @@ class PageTimingMetricsSender {
   IPC::Sender* const ipc_sender_;
   const int routing_id_;
   std::unique_ptr<base::Timer> timer_;
-  PageLoadTiming last_timing_;
+  mojo::StructPtr<mojom::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_;
+  mojom::PageLoadMetadata metadata_;
 
   DISALLOW_COPY_AND_ASSIGN(PageTimingMetricsSender);
 };