[Sensors] Remove SensorReading interfaces

third_party/WebKit/LayoutTests/sensor/accelerometer.html

Index: third_party/WebKit/LayoutTests/sensor/accelerometer.html
diff --git a/third_party/WebKit/LayoutTests/sensor/accelerometer.html b/third_party/WebKit/LayoutTests/sensor/accelerometer.html
index 9339d358e6ae23edd23754f4e58c9081523c46e9..98c6f5d5f7d84fc59005c3fc2f3ecc5a34b6f342 100644
--- a/third_party/WebKit/LayoutTests/sensor/accelerometer.html
+++ b/third_party/WebKit/LayoutTests/sensor/accelerometer.html
@@ -24,10 +24,17 @@ function update_sensor_reading(buffer, expects_modified_reading, readsCount) {
     buffer[2] += readsCount;
 }
 
-function verify_sensor_reading(reading) {
-  return reading.x == kDefaultReadingX &&
-         reading.y == kDefaultReadingY &&
-         reading.z == kDefaultReadingZ;
+function verify_sensor_reading(sensor, should_be_null) {
+  if (should_be_null) {
+    return sensor.x == null &&
+           sensor.y == null &&
+           sensor.z == null &&
+           sensor.timestamp == null;
+  }
+  return sensor.x == kDefaultReadingX &&
+         sensor.y == kDefaultReadingY &&
+         sensor.z == kDefaultReadingZ &&
+         sensor.timestamp != null;
 }
 
 runGenericSensorTests(Accelerometer, update_sensor_reading, verify_sensor_reading);