Initial UKMPageLoadMetricsObserver

components/ukm/ukm_source.h

+// Copyright 2017 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 COMPONENTS_UKM_UKM_SOURCE_H_
+#define COMPONENTS_UKM_UKM_SOURCE_H_
+
+#include <stddef.h>
+
+#include "base/macros.h"
+#include "base/time/time.h"
+#include "url/gurl.h"
+
+namespace ukm {
+
+class Source;
+
+class UkmSource {
+ public:
+  UkmSource();
+  ~UkmSource();
+
+  void set_committed_url(const GURL& committed_url) {
+    committed_url_ = committed_url;
+  }
+  void set_navigation_start(const base::TimeTicks& navigation_start) {
+    navigation_start_ = navigation_start;
+  }
+  void set_first_meaningful_paint(
+      const base::TimeDelta& first_meaningful_paint) {
+    first_meaningful_paint_ = first_meaningful_paint;
+  }
+
+  void PopulateProto(Source* proto_source);
+
+ private:
+  GURL committed_url_;
+  base::TimeTicks navigation_start_;
+  base::TimeDelta first_meaningful_paint_;
+};
+
+}  // namespace ukm
+
+#endif  // COMPONENTS_UKM_UKM_SOURCE_H_