Fix default initialization for DeviceMotionEvent.interval.

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

Index: third_party/WebKit/Source/modules/device_orientation/DeviceMotionEvent.cpp
diff --git a/third_party/WebKit/Source/modules/device_orientation/DeviceMotionEvent.cpp b/third_party/WebKit/Source/modules/device_orientation/DeviceMotionEvent.cpp
index 1975a4963a52b3e27bd5563f661f5d9e91a12a8c..e8a83b41fb21b19258df0bd0da87f82b08878107 100644
--- a/third_party/WebKit/Source/modules/device_orientation/DeviceMotionEvent.cpp
+++ b/third_party/WebKit/Source/modules/device_orientation/DeviceMotionEvent.cpp
@@ -81,11 +81,8 @@ DeviceRotationRate* DeviceMotionEvent::rotationRate() {
 }
 
 double DeviceMotionEvent::interval(bool& isNull) const {
-  if (m_deviceMotionData->canProvideInterval())
-    return m_deviceMotionData->interval();
-
-  isNull = true;
-  return 0;
+  isNull = false;
+  return m_deviceMotionData->interval();
 }
 
 const AtomicString& DeviceMotionEvent::interfaceName() const {