Screen Orientation API: Add support for lockOrientation() / unlockOrientation()

LayoutTests/screen_orientation/lockOrientation-bad-argument-expected.txt

Index: LayoutTests/screen_orientation/lockOrientation-bad-argument-expected.txt
diff --git a/LayoutTests/screen_orientation/lockOrientation-bad-argument-expected.txt b/LayoutTests/screen_orientation/lockOrientation-bad-argument-expected.txt
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index 0000000000000000000000000000000000000000..a21f6726fe504aa51e7e9e22e7db528f476951ba
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+++ b/LayoutTests/screen_orientation/lockOrientation-bad-argument-expected.txt
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+Validates that screen.lockOrientation() returns false on bad input
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+
+PASS screen.orientation is "portrait-primary"
+PASS screen.lockOrientation('invalid-orientation') is false
+PASS screen.orientation is "portrait-primary"
+PASS screen.lockOrientation(null) is false
+PASS screen.orientation is "portrait-primary"
+PASS screen.lockOrientation(undefined) is false
+PASS screen.orientation is "portrait-primary"
+PASS screen.lockOrientation(123) is false
+PASS screen.orientation is "portrait-primary"
+PASS screen.lockOrientation(window) is false
+PASS screen.orientation is "portrait-primary"
+PASS screen.lockOrientation() threw exception TypeError: Failed to execute 'lockOrientation' on 'Screen': 1 argument required, but only 0 present..
+PASS screen.orientation is "portrait-primary"
+PASS successfullyParsed is true
+
+TEST COMPLETE
+