FaceDetection: add support for <video> input

third_party/WebKit/LayoutTests/fast/shapedetection/shapedetection-empty-input.html

Index: third_party/WebKit/LayoutTests/fast/shapedetection/shapedetection-empty-input.html
diff --git a/third_party/WebKit/LayoutTests/fast/shapedetection/shapedetection-empty-input.html b/third_party/WebKit/LayoutTests/fast/shapedetection/shapedetection-empty-input.html
index 10e9c54d246fe708abd01a86179851039732dca5..7f62e5c8f7cf51e256a15f615b4bd83a383508f2 100644
--- a/third_party/WebKit/LayoutTests/fast/shapedetection/shapedetection-empty-input.html
+++ b/third_party/WebKit/LayoutTests/fast/shapedetection/shapedetection-empty-input.html
@@ -5,21 +5,21 @@
 
 // This test verifies FaceDetector.detect() with an empty HTMLImageElement.
 async_test(function(t) {
-    var image = new Image();
-    var faceDetector = new FaceDetector();
-    var tryFaceDetection = function() {
-      faceDetector.detect(image)
-          .then(faceDetectionResult => {
-            assert_equals(faceDetectionResult.length, 0);
-            t.done();
-          })
-          .catch(error => {
-            assert_unreached("detect() should not reject: " + error)
-          });
-    };
-    image.onload = tryFaceDetection;
-    image.onerror = tryFaceDetection;
-    image.src = "";
+  var image = new Image();
+  var faceDetector = new FaceDetector();
+  var tryFaceDetection = function() {
+    faceDetector.detect(image)
+        .then(faceDetectionResult => {
+          assert_equals(faceDetectionResult.length, 0);
+          t.done();
+        })
+        .catch(error => {
+          assert_unreached("detect() rejected with error: " + error)
+        });
+  };
+  image.onload = tryFaceDetection;
+  image.onerror = tryFaceDetection;
+  image.src = "";
 }, "FaceDetector should resolve empty images with empty results.");
 
 </script>