Revert of [screen-orientation] Update implementation to match recent spec changes.

LayoutTests/fast/dom/Window/property-access-on-cached-window-after-frame-removed-and-gced-expected.txt

 CONSOLE WARNING: 'window.webkitStorageInfo' is deprecated. Please use 'navigator.webkitTemporaryStorage' or 'navigator.webkitPersistentStorage' instead.
 Tests property access on a cached DOMWindow after the associated frame is removed from a web page and garbage collected. Test should not crash and properties should be set to sane defaults.
 
 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
 
 
 FAIL childWindow.applicationCache.oncached should be null. Threw exception TypeError: Cannot read property 'oncached' of null
 FAIL childWindow.applicationCache.onchecking should be null. Threw exception TypeError: Cannot read property 'onchecking' of null
 FAIL childWindow.applicationCache.ondownloading should be null. Threw exception TypeError: Cannot read property 'ondownloading' of null
 FAIL childWindow.applicationCache.onerror should be null. Threw exception TypeError: Cannot read property 'onerror' of null
@@ skipping 165 matching lines @@
 PASS childWindow.performance.timing.secureConnectionStart is 0
 PASS childWindow.performance.timing.unloadEventEnd is 0
 PASS childWindow.performance.timing.unloadEventStart is 0
 PASS childWindow.personalbar.visible is false
 PASS childWindow.screen.availHeight is 0
 PASS childWindow.screen.availLeft is 0
 PASS childWindow.screen.availTop is 0
 PASS childWindow.screen.availWidth is 0
 PASS childWindow.screen.colorDepth is 0
 PASS childWindow.screen.height is 0
-FAIL childWindow.screen.orientation.angle should be 0. Threw exception TypeError: Cannot read property 'angle' of null
-FAIL childWindow.screen.orientation.onchange should be null. Threw exception TypeError: Cannot read property 'onchange' of null
-FAIL childWindow.screen.orientation.type should be . Threw exception TypeError: Cannot read property 'type' of null
+PASS childWindow.screen.orientation is 'portrait-primary'
 PASS childWindow.screen.pixelDepth is 0
 PASS childWindow.screen.width is 0
 PASS childWindow.screenLeft is 0
 PASS childWindow.screenTop is 0
 PASS childWindow.screenX is 0
 PASS childWindow.screenY is 0
 PASS childWindow.scrollX is 0
 PASS childWindow.scrollY is 0
 PASS childWindow.scrollbars.visible is false
 FAIL childWindow.speechSynthesis.onvoiceschanged should be null. Threw exception TypeError: Cannot read property 'onvoiceschanged' of null
 FAIL childWindow.speechSynthesis.paused should be false. Threw exception TypeError: Cannot read property 'paused' of null
 FAIL childWindow.speechSynthesis.pending should be false. Threw exception TypeError: Cannot read property 'pending' of null
 FAIL childWindow.speechSynthesis.speaking should be false. Threw exception TypeError: Cannot read property 'speaking' of null
 PASS childWindow.status is ''
 PASS childWindow.statusbar.visible is false
 PASS childWindow.styleMedia.type is ''
 PASS childWindow.toolbar.visible is false
 PASS successfullyParsed is true
 
 TEST COMPLETE