Screen Orientation: use OrientationLockType enum for lockOrientation().

LayoutTests/screen_orientation/lockOrientation-bad-argument.html

Index: LayoutTests/screen_orientation/lockOrientation-bad-argument.html
diff --git a/LayoutTests/screen_orientation/lockOrientation-bad-argument.html b/LayoutTests/screen_orientation/lockOrientation-bad-argument.html
index 8a4fc88ab3c0866a06cb432683107135c31af89c..95456dbe7356b7605a236a39675d184f01fd8de8 100644
--- a/LayoutTests/screen_orientation/lockOrientation-bad-argument.html
+++ b/LayoutTests/screen_orientation/lockOrientation-bad-argument.html
@@ -18,18 +18,22 @@ function completeTest() {
 
 screen.addEventListener("orientationchange", onOrientationChangeEvent);
 
+function typeErrorEnum(argStr) {
+  return "TypeError: Failed to execute 'lockOrientation' on 'Screen': parameter 1 ('" + argStr + "') is not a valid enum value.";
+}
+
 shouldBeEqualToString("screen.orientation", "portrait-primary");
-shouldBeFalse("screen.lockOrientation('invalid-orientation')");
+shouldThrow("screen.lockOrientation('invalid-orientation')", "typeErrorEnum('invalid-orientation')");
 shouldBeEqualToString("screen.orientation", "portrait-primary");
-shouldBeFalse("screen.lockOrientation(null)");
+shouldThrow("screen.lockOrientation(null)", "typeErrorEnum('null')");
 shouldBeEqualToString("screen.orientation", "portrait-primary");
-shouldBeFalse("screen.lockOrientation(undefined)");
+shouldThrow("screen.lockOrientation(undefined)", "typeErrorEnum('undefined')");
 shouldBeEqualToString("screen.orientation", "portrait-primary");
-shouldBeFalse("screen.lockOrientation(123)");
+shouldThrow("screen.lockOrientation(123)", "typeErrorEnum('123')");
 shouldBeEqualToString("screen.orientation", "portrait-primary");
-shouldBeFalse("screen.lockOrientation(window)");
+shouldThrow("screen.lockOrientation(window)", "typeErrorEnum('[object Window]')");
 shouldBeEqualToString("screen.orientation", "portrait-primary");
-shouldBeFalse("screen.lockOrientation(['portrait-primary', 'landscape-primary'])");
+shouldThrow("screen.lockOrientation(['portrait-primary', 'landscape-primary'])", "typeErrorEnum('portrait-primary,landscape-primary')");
 shouldBeEqualToString("screen.orientation", "portrait-primary");
 shouldThrow("screen.lockOrientation()", '"TypeError: Failed to execute \'lockOrientation\' on \'Screen\': 1 argument required, but only 0 present."');