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

chrome/renderer/page_load_metrics/fake_page_timing_metrics_ipc_sender.h

Index: chrome/renderer/page_load_metrics/fake_page_timing_metrics_ipc_sender.h
diff --git a/chrome/renderer/page_load_metrics/fake_page_timing_metrics_ipc_sender.h b/chrome/renderer/page_load_metrics/fake_page_timing_metrics_ipc_sender.h
index 610283e2f839219314a2e91eeb163e94fda1029d..cc18b9b558d2229fd28355f546a0b17dfe97c760 100644
--- a/chrome/renderer/page_load_metrics/fake_page_timing_metrics_ipc_sender.h
+++ b/chrome/renderer/page_load_metrics/fake_page_timing_metrics_ipc_sender.h
@@ -53,18 +53,18 @@ class FakePageTimingMetricsIPCSender : public IPC::Sender {
   // expected timings provided via ExpectPageLoadTiming.
   void VerifyExpectedTimings() const;
 
-  const std::vector<PageLoadTiming>& expected_timings() const {
+  const std::vector<mojo::StructPtr<PageLoadTiming>>& expected_timings() const {
     return expected_timings_;
   }
-  const std::vector<PageLoadTiming>& actual_timings() const {
+  const std::vector<mojo::StructPtr<PageLoadTiming>>& actual_timings() const {
     return actual_timings_;
   }
 
  private:
   void OnTimingUpdated(const PageLoadTiming& timing, PageLoadMetadata metadata);
 
-  std::vector<PageLoadTiming> expected_timings_;
-  std::vector<PageLoadTiming> actual_timings_;
+  std::vector<mojo::StructPtr<PageLoadTiming>> expected_timings_;
+  std::vector<mojo::StructPtr<PageLoadTiming>> actual_timings_;
 };
 
 }  // namespace page_load_metrics