Remove non-standard DeviceOrientation Event initializers.

third_party/WebKit/Source/modules/device_orientation/DeviceMotionEvent.idl

Index: third_party/WebKit/Source/modules/device_orientation/DeviceMotionEvent.idl
diff --git a/third_party/WebKit/Source/modules/device_orientation/DeviceMotionEvent.idl b/third_party/WebKit/Source/modules/device_orientation/DeviceMotionEvent.idl
index 079cc1ddeb313ae975cce46d1dbfc8474d637352..5477afd61d32058f0179e3dc42fd25407a600e5d 100644
--- a/third_party/WebKit/Source/modules/device_orientation/DeviceMotionEvent.idl
+++ b/third_party/WebKit/Source/modules/device_orientation/DeviceMotionEvent.idl
@@ -31,14 +31,4 @@ interface DeviceMotionEvent : Event {
     readonly attribute DeviceAcceleration? accelerationIncludingGravity;
     readonly attribute DeviceRotationRate? rotationRate;
     readonly attribute double? interval;
-
-    // TODO(foolip): The init*Event() methods are not in the spec:
-    // https://github.com/w3c/deviceorientation/issues/18
-    [Custom, Measure] void initDeviceMotionEvent([Default=Undefined] optional DOMString type,
-                                                 [Default=Undefined] optional boolean bubbles,
-                                                 [Default=Undefined] optional boolean cancelable,
-                                                 [Default=Undefined] optional DeviceAcceleration acceleration,
-                                                 [Default=Undefined] optional DeviceAcceleration accelerationIncludingGravity,
-                                                 [Default=Undefined] optional DeviceRotationRate rotationRate,
-                                                 [Default=Undefined] optional double interval);
 };