[sensors]: Introduce the Generic Sensor API.

third_party/WebKit/Source/modules/sensor/SensorReading.cpp

Index: third_party/WebKit/Source/modules/sensor/SensorReading.cpp
diff --git a/third_party/WebKit/Source/modules/sensor/SensorReading.cpp b/third_party/WebKit/Source/modules/sensor/SensorReading.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..73d7949d0dc9eace59f7b390a9bfc592df04f9a9
--- /dev/null
+++ b/third_party/WebKit/Source/modules/sensor/SensorReading.cpp
@@ -0,0 +1,28 @@
+// 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.
+
+#include "modules/sensor/SensorReading.h"
+
+namespace blink {
+
+SensorReading::SensorReading()
+    : m_timeStamp(-1)
+{
+}
+
+SensorReading::SensorReading(DOMHighResTimeStamp timeStamp)
+    : m_timeStamp(timeStamp)
+{
+}
+
+SensorReading::~SensorReading()
+{
+}
+
+DEFINE_TRACE(SensorReading)
+{
+}
+
+
+} // namespace blink