[DeviceLight] Add renderer+common parts

content/common/device_sensors/device_light_data.h

+// Copyright 2014 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 CONTENT_COMMON_DEVICE_SENSORS_DEVICE_LIGHT_DATA_H_
+#define CONTENT_COMMON_DEVICE_SENSORS_DEVICE_LIGHT_DATA_H_
+
+#pragma pack(push, 1)
+
+class DeviceLightData {
+ public:
+    DeviceLightData() {
+      memset(this, 0, sizeof(*this));

[timvolodine, 2014/06/03 16:08:12]

I would not inline and create a corresponding .cpp file and put the constructor
there, as we did with other similar classes.

[riju_, 2014/06/05 19:49:59]

Done.

+    }
+    ~DeviceLightData() { }
+
+    double value;
+    bool valueIsUpdated : 1;
+};
+
+#pragma pack(pop)
+
+#endif  // CONTENT_COMMON_DEVICE_SENSORS_DEVICE_LIGHT_DATA_H_
+