Convert RapporRecorder to use mojo.

chrome/browser/rappor_recorder_impl.h

+// 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_RAPPOR_RECORDER_IMPL_H_
+#define CHROME_BROWSER_RAPPOR_RECORDER_IMPL_H_
+
+#include "chrome/common/rappor_recorder.mojom.h"
+
+class GURL;
+
+class RapporRecorderImpl : public mojom::RapporRecorder {
+ public:
+  RapporRecorderImpl();
+  ~RapporRecorderImpl() override;
+
+  static void Create(mojom::RapporRecorderRequest request);
+
+ private:
+  void RecordRappor(const std::string& metric,
+                    const std::string& sample) override;
+  void RecordRapporURL(const std::string& metric, const GURL& sample) override;
+};
+
+#endif  // CHROME_BROWSER_RAPPOR_RECORDER_IMPL_H_