Implement the Blink part of the Device Motion API.

LayoutTests/fast/dom/DeviceMotion/script-tests/add-listener-from-callback.js

+description('Tests that adding a new devicemotion event listener from a callback works as expected.');
+
+var mockAccelerationX = 1.1;
+var mockAccelerationY = 2.1;
+var mockAccelerationZ = 3.1;
+
+var mockAccelerationIncludingGravityX = 1.2;
+var mockAccelerationIncludingGravityY = 2.2;
+var mockAccelerationIncludingGravityZ = 3.2;
+
+var mockRotationRateAlpha = 1.3;
+var mockRotationRateBeta = 2.3;
+var mockRotationRateGamma = 3.3;
+
+var mockInterval = 100;
+
+if (window.testRunner) {
+    testRunner.setMockDeviceMotion();
+    debug('TEST MODE enabled');
+} else
+    debug('This test can not be run without the TestRunner');
+
+var deviceOrientationEvent;
+function checkOrientation(event) {
+    deviceOrientationEvent = event;
+    shouldBe('deviceOrientationEvent.acceleration.x', 'mockAccelerationX');
+    shouldBe('deviceOrientationEvent.acceleration.y', 'mockAccelerationY');
+    shouldBe('deviceOrientationEvent.acceleration.z', 'mockAccelerationZ');
+
+    shouldBe('deviceOrientationEvent.accelerationIncludingGravity.x', 'mockAccelerationIncludingGravityX');
+    shouldBe('deviceOrientationEvent.accelerationIncludingGravity.y', 'mockAccelerationIncludingGravityY');
+    shouldBe('deviceOrientationEvent.accelerationIncludingGravity.z', 'mockAccelerationIncludingGravityZ');
+
+    shouldBe('deviceOrientationEvent.rotationRate.alpha', 'mockRotationRateAlpha');
+    shouldBe('deviceOrientationEvent.rotationRate.beta', 'mockRotationRateBeta');
+    shouldBe('deviceOrientationEvent.rotationRate.gamma', 'mockRotationRateGamma');
+
+    shouldBe('deviceOrientationEvent.interval', 'mockInterval');
+}
+
+function listener(event) {
+    checkOrientation(event);
+    finishJSTest();
+}
+
+window.addEventListener('devicemotion', listener);
+window.jsTestIsAsync = true;
+
+if (window.testRunner)
+    testRunner.fireMockDeviceMotion(true, mockAccelerationX, true, mockAccelerationY, true, mockAccelerationZ,
+                                    true, mockAccelerationIncludingGravityX, true, mockAccelerationIncludingGravityY, true, mockAccelerationIncludingGravityZ,
+                                    true, mockRotationRateAlpha, true, mockRotationRateBeta, true, mockRotationRateGamma,
+                                    mockInterval);