Create a DataUseRecorder instance for each page load in Chrome.

chrome/browser/data_use_measurement/chrome_data_use_recorder.h

Index: chrome/browser/data_use_measurement/chrome_data_use_recorder.h
diff --git a/chrome/browser/data_use_measurement/chrome_data_use_recorder.h b/chrome/browser/data_use_measurement/chrome_data_use_recorder.h
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+// Copyright 2016 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_BROWSER_DATA_USE_MEASUREMENT_CHROME_DATA_USE_RECORDER_H_
+#define CHROME_BROWSER_DATA_USE_MEASUREMENT_CHROME_DATA_USE_RECORDER_H_
+
+#include <utility>
+
+#include "base/macros.h"
+#include "components/data_use_measurement/core/data_use_recorder.h"
+#include "content/public/browser/global_request_id.h"
+
+namespace data_use_measurement {
+
+typedef std::pair<int, int> RenderFrameHostID;
+
+class ChromeDataUseRecorder : public DataUseRecorder {
+ public:
+  ChromeDataUseRecorder();
+
+  ~ChromeDataUseRecorder();
+
+  RenderFrameHostID main_frame_id() { return main_frame_id_; }

[RyanSturm, 2016/11/29 20:32:59]

const method

[Not at Google. Contact bengr, 2016/11/30 00:21:16]

Done.

+
+  void set_main_frame_id(RenderFrameHostID frame_id) {
+    main_frame_id_ = frame_id;
+  }
+
+  void set_main_frame_request_id(content::GlobalRequestID request_id) {
+    main_frame_request_id_ = request_id;
+  }
+
+  content::GlobalRequestID main_frame_request_id() {

[RyanSturm, 2016/11/29 20:32:59]

const method

[Not at Google. Contact bengr, 2016/11/30 00:21:16]

Done.

+    return main_frame_request_id_;
+  }
+
+ private:
+  // Identifier for the main frame for the page load this recorder is tracking.
+  // Only valid if the data use is associated with a page load.
+  RenderFrameHostID main_frame_id_;
+
+  // Identifier for the MAIN_FRAME request for this page load. Only valid if
+  // the data use is associated with a page load.
+  content::GlobalRequestID main_frame_request_id_;
+};
+
+}  // namespace data_use_measurement
+
+#endif  // CHROME_BROWSER_DATA_USE_MEASUREMENT_CHROME_DATA_USE_RECORDER_H_