Implement DeviceOrientationEvent constructor.

third_party/WebKit/Source/modules/device_orientation/DeviceOrientationData.cpp

Index: third_party/WebKit/Source/modules/device_orientation/DeviceOrientationData.cpp
diff --git a/third_party/WebKit/Source/modules/device_orientation/DeviceOrientationData.cpp b/third_party/WebKit/Source/modules/device_orientation/DeviceOrientationData.cpp
index a268c5975f09efa80f887228529577a800539b54..7f0b9dc97d999349750e822f6abd19f906d01e84 100644
--- a/third_party/WebKit/Source/modules/device_orientation/DeviceOrientationData.cpp
+++ b/third_party/WebKit/Source/modules/device_orientation/DeviceOrientationData.cpp
@@ -24,6 +24,8 @@
  */
 
 #include "modules/device_orientation/DeviceOrientationData.h"
+
+#include "modules/device_orientation/DeviceOrientationEventInit.h"
 #include "public/platform/modules/device_orientation/WebDeviceOrientationData.h"
 
 namespace blink {
@@ -41,6 +43,20 @@ DeviceOrientationData* DeviceOrientationData::create(
 }
 
 DeviceOrientationData* DeviceOrientationData::create(
+    const DeviceOrientationEventInit& init) {
+  Nullable<double> alpha;
+  Nullable<double> beta;
+  Nullable<double> gamma;
+  if (init.hasAlpha())
+    alpha = init.alpha();
+  if (init.hasBeta())
+    beta = init.beta();
+  if (init.hasGamma())
+    gamma = init.gamma();
+  return DeviceOrientationData::create(alpha, beta, gamma, init.absolute());
+}
+
+DeviceOrientationData* DeviceOrientationData::create(
     const WebDeviceOrientationData& data) {
   Nullable<double> alpha;
   Nullable<double> beta;