Re-enable device-orientation-success.js layout test

I've made several sensor changes since this test was disabled that
should fix the flakiness.

Bug: 846920
Change-Id: Ibe38cad96acd7d5636f89d0eb8a6d915ab6798a0
Reviewed-on: https://chromium-review.googlesource.com/1089712
Commit-Queue: Robbie McElrath <rmcelrath@chromium.org>
Reviewed-by: Reilly Grant <reillyg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#565335}

third_party/WebKit/LayoutTests/TestExpectations

@@ -4755,7 +4755,6 @@ crbug.com/749738 http/tests/devtools/editor/text-editor-word-jumps.js [ Timeout
 crbug.com/846997 http/tests/devtools/editor/text-editor-ctrl-d-1.js [ Timeout Pass ]
 crbug.com/846982 http/tests/devtools/editor/text-editor-formatter.js [ Timeout Pass ]
 crbug.com/847094 [ Mac ] virtual/new-remote-playback-pipeline/media/controls/modern/tap-to-hide-controls.html [ Skip ]
-crbug.com/846920 http/tests/devtools/device-orientation-success.js [ Pass Failure ]
 crbug.com/846981 fast/webgl/texImage-imageBitmap-from-imageData-resize.html [ Pass Timeout ]
 crbug.com/847114 [ Linux ] http/tests/devtools/tracing/decode-resize.js [ Pass Failure ]
 crbug.com/847205 [ Mac ] http/tests/devtools/tracing/timeline-misc/timeline-window-filter.js [ Pass Crash Timeout ]

third_party/WebKit/LayoutTests/http/tests/devtools/device-orientation-success-expected.txt

@@ -16,3 +16,4 @@ inspected-page.html:1 A reload is required so that the existing AbsoluteOrientat
 device-orientation-success.js:32 alpha: 90 beta: 0 gamma: 0
 device-orientation-success.js:39 quaternion: 0.000000,0.000000,0.707107,0.707107
 device-orientation-success.js:32 alpha: 1.1 beta: 2.2 gamma: 3.3
+