Adding DRP specfic UMA for FirstContentfulPaint

chrome/browser/page_load_metrics/observers/page_load_metrics_observer_test_harness.h

Index: chrome/browser/page_load_metrics/observers/page_load_metrics_observer_test_harness.h
diff --git a/chrome/browser/page_load_metrics/observers/page_load_metrics_observer_test_harness.h b/chrome/browser/page_load_metrics/observers/page_load_metrics_observer_test_harness.h
index dfd69a9e22c278017ba07718777ad4a8da3968b2..5b809dafc176cb101813750f798600dfae569d26 100644
--- a/chrome/browser/page_load_metrics/observers/page_load_metrics_observer_test_harness.h
+++ b/chrome/browser/page_load_metrics/observers/page_load_metrics_observer_test_harness.h
@@ -4,20 +4,25 @@
 
 #ifndef CHROME_BROWSER_PAGE_LOAD_METRICS_OBSERVERS_PAGE_LOAD_METRICS_OBSERVER_TEST_HARNESS_H_
 #define CHROME_BROWSER_PAGE_LOAD_METRICS_OBSERVERS_PAGE_LOAD_METRICS_OBSERVER_TEST_HARNESS_H_
 
 #include "base/macros.h"
 #include "base/test/histogram_tester.h"
 #include "chrome/test/base/chrome_render_view_host_test_harness.h"
 #include "components/page_load_metrics/browser/metrics_web_contents_observer.h"
 #include "content/public/test/web_contents_tester.h"
 
+namespace content {
+class NavigationData;
+class NavigationHandle;
+}
+
 namespace page_load_metrics {
 
 // This class can be used to drive tests of PageLoadMetricsObservers. To hook up
 // an observer, override RegisterObservers and call tracker->AddObserver. This
 // will attach the observer to all main frame navigations.
 class PageLoadMetricsObserverTestHarness
     : public ChromeRenderViewHostTestHarness {
  public:
   PageLoadMetricsObserverTestHarness();
   ~PageLoadMetricsObserverTestHarness() override;
@@ -34,20 +39,25 @@ class PageLoadMetricsObserverTestHarness
   // navigation.
   void StartNavigation(const GURL& gurl);
 
   // Call this to simulate sending a PageLoadTiming IPC from the render process
   // to the browser process. These will update the timing information for the
   // most recently committed navigation.
   void SimulateTimingUpdate(const PageLoadTiming& timing);
   void SimulateTimingAndMetadataUpdate(const PageLoadTiming& timing,
                                        const PageLoadMetadata& metadata);
 
+  // Sets NavigationData on |navigation_handle|
+  void SetNavigationData(
+      content::NavigationHandle* navigation_handle,
+      std::unique_ptr<content::NavigationData> navigation_data);
+
   const base::HistogramTester& histogram_tester() const;
 
  private:
   base::HistogramTester histogram_tester_;
   MetricsWebContentsObserver* observer_;
 
   DISALLOW_COPY_AND_ASSIGN(PageLoadMetricsObserverTestHarness);
 };
 
 }  // namespace page_load_metrics