Implement DeviceOrientationEvent constructor.

third_party/WebKit/Source/modules/device_orientation/DeviceOrientationEvent.h

Index: third_party/WebKit/Source/modules/device_orientation/DeviceOrientationEvent.h
diff --git a/third_party/WebKit/Source/modules/device_orientation/DeviceOrientationEvent.h b/third_party/WebKit/Source/modules/device_orientation/DeviceOrientationEvent.h
index fdf0f96f1a5cc35ad4535ff55de1c27ba8d67ceb..14493aff601ab3f723b907af7a7af3b01cc5e4b9 100644
--- a/third_party/WebKit/Source/modules/device_orientation/DeviceOrientationEvent.h
+++ b/third_party/WebKit/Source/modules/device_orientation/DeviceOrientationEvent.h
@@ -32,6 +32,7 @@
 
 namespace blink {
 
+class DeviceOrientationEventInit;
 class DeviceOrientationData;
 
 class DeviceOrientationEvent final : public Event {
@@ -40,6 +41,11 @@ class DeviceOrientationEvent final : public Event {
  public:
   ~DeviceOrientationEvent() override;
   static DeviceOrientationEvent* create() { return new DeviceOrientationEvent; }
+  static DeviceOrientationEvent* create(
+      const AtomicString& eventType,
+      const DeviceOrientationEventInit& initializer) {
+    return new DeviceOrientationEvent(eventType, initializer);
+  }
   static DeviceOrientationEvent* create(const AtomicString& eventType,
                                         DeviceOrientationData* orientation) {
     return new DeviceOrientationEvent(eventType, orientation);
@@ -66,6 +72,8 @@ class DeviceOrientationEvent final : public Event {
 
  private:
   DeviceOrientationEvent();
+  DeviceOrientationEvent(const AtomicString&,
+                         const DeviceOrientationEventInit&);
   DeviceOrientationEvent(const AtomicString& eventType, DeviceOrientationData*);
 
   Member<DeviceOrientationData> m_orientation;