[sensors]: Introduce the Generic Sensor API.

third_party/WebKit/Source/modules/sensor/SensorReadingEvent.idl

Index: third_party/WebKit/Source/modules/sensor/SensorReadingEvent.idl
diff --git a/third_party/WebKit/Source/modules/sensor/SensorReadingEvent.idl b/third_party/WebKit/Source/modules/sensor/SensorReadingEvent.idl
new file mode 100644
index 0000000000000000000000000000000000000000..95265267f59b4f891e2a7caac42f524f70080c54
--- /dev/null
+++ b/third_party/WebKit/Source/modules/sensor/SensorReadingEvent.idl
@@ -0,0 +1,12 @@
+// 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.
+
+// Specification at:
+// https://w3c.github.io/sensors/#sensorreadingevent
+
+[ RuntimeEnabled=Sensor,
+  Constructor(DOMString type, SensorReadingEventInit eventInitDict)]
+interface SensorReadingEvent : Event {
+  readonly attribute SensorReading reading;

[timvolodine, 2016/05/06 17:04:30]

is there a reason to have both SensorReadingEvent and SensorReading? would
SensorReadingEvent be sufficient?

[riju_, 2016/05/12 14:12:46]

Spec issue : https://github.com/w3c/sensors/issues/103

[timvolodine, 2016/05/17 17:44:39]

yeah may be possible to drop the reading here.. would simplify implementation
down the road quite a bit

[riju_, 2016/05/20 11:20:11]

Can we keep this for the time being? 
I am working with the spec authors and others to find consensus.
We can change the code, when the spec changes.

[timvolodine, 2016/05/24 15:30:35]

sgtm ;)

+};