W3CImportExpectations: Un-skip wpt/orientation-event.

Now that the DeviceMotionEvent and DeviceOrientationEvent constructors
are implemented the majority of these tests should pass.

BUG=651767

Review-Url: https://codereview.chromium.org/2737653003
Cr-Commit-Position: refs/heads/master@{#455294}
diff --git a/third_party/WebKit/LayoutTests/W3CImportExpectations b/third_party/WebKit/LayoutTests/W3CImportExpectations
index 9fb8004f..e7ea1fe 100644
--- a/third_party/WebKit/LayoutTests/W3CImportExpectations
+++ b/third_party/WebKit/LayoutTests/W3CImportExpectations
@@ -298,7 +298,8 @@
 external/wpt/notifications [ Skip ]
 external/wpt/offscreen-canvas [ Skip ]
 external/wpt/old-tests [ Skip ]
-external/wpt/orientation-event [ Skip ]
+## Owners: [email protected],[email protected]
+# external/wpt/orientation-event [ Pass ]
 external/wpt/payment-request [ Skip ]
 external/wpt/page-visibility [ Skip ]
 external/wpt/performance-timeline [ Skip ]