[TimeZoneMonitor] Decouple renderer side impl from content to blink.

third_party/WebKit/Source/modules/time_zone_monitor/TimeZoneMonitorClient.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 TimeZoneMonitorClient_h
+#define TimeZoneMonitorClient_h
+
+#include "device/time_zone_monitor/public/interfaces/time_zone_monitor.mojom.h"
+#include "mojo/public/cpp/bindings/binding.h"
+
+namespace blink {
+
+class TimeZoneMonitorClient final
+    : public device::mojom::TimeZoneMonitorClient {
+ public:
+  static void Init();
+
+  ~TimeZoneMonitorClient() override;
+
+ private:
+  TimeZoneMonitorClient();
+
+  // device::mojom::TimeZoneClient:
+  void OnTimeZoneChange(const std::string& tzInfo) override;
+
+  mojo::Binding<device::mojom::TimeZoneMonitorClient> m_binding;
+};
+
+}  // namespace blink
+
+#endif  // TimeZoneMonitorClient_h