Change MouseEvent.button to be 'short' instead of 'unsigned short'

LayoutTests/fast/events/constructors/mouse-event-constructor.html

Index: LayoutTests/fast/events/constructors/mouse-event-constructor.html
diff --git a/LayoutTests/fast/events/constructors/mouse-event-constructor.html b/LayoutTests/fast/events/constructors/mouse-event-constructor.html
index 1aa56fe84c391248b16f7823fb1d29386e7d3272..710e328b4af21d3221683d0061602f194988d43f 100644
--- a/LayoutTests/fast/events/constructors/mouse-event-constructor.html
+++ b/LayoutTests/fast/events/constructors/mouse-event-constructor.html
@@ -103,17 +103,18 @@ var MIN_CLIENT_SIZE = "-33554432";
 });
 
 // button is passed.
-// Numbers within the unsigned short range.
+// Numbers within the short range.
 shouldBe("new MouseEvent('eventType', { button: 0 }).button", "0");
 shouldBe("new MouseEvent('eventType', { button: 1 }).button", "1");
-shouldBe("new MouseEvent('eventType', { button: 65534 }).button", "65534");
+shouldBe("new MouseEvent('eventType', { button: 65534 }).button", "-2");

[philipj_slow, 2015/06/10 13:54:46]

Oh, I guess you should actually move this to the "Numbers out of the short
range". The range of short is [-32768, 32765] so can you make sure to test those
boundary points as well?

[ramya.v, 2015/06/11 05:02:13]

Done.

+shouldBe("new MouseEvent('eventType', { button: -2 }).button", "-2");
 
-// Numbers that are equal to ((unsigned short)-1) should be treated as 0.
+// Numbers that are equal to -1 should be treated as 0.
 shouldBe("new MouseEvent('eventType', { button: 65535 }).button", "0");
 shouldBe("new MouseEvent('eventType', { button: 9007199254740991 }).button", "0");
 shouldBe("new MouseEvent('eventType', { button: -1 }).button", "0");
 
-// Numbers out of the unsigned short range.
+// Numbers out of the short range.
 // 2^{64}-1
 shouldBe("new MouseEvent('eventType', { button: 18446744073709551615 }).button", "0");
 shouldBe("new MouseEvent('eventType', { button: 12345678901234567890 }).button", "2048");
@@ -135,12 +136,12 @@ shouldBe("new MouseEvent('eventType', { button: {moemoe: 12345} }).button", "0")
 shouldBe("new MouseEvent('eventType', { button: {valueOf: function () { return 12345; }} }).button", "12345");
 
 // buttons is passed.
-// Numbers within the unsigned short range.
+// Numbers within the short range.

[philipj_slow, 2015/06/10 13:54:46]

Oops, buttons is still unsigned short, change this and the below back :)

[ramya.v, 2015/06/11 05:02:14]

Done.

 shouldBe("new MouseEvent('eventType', { buttons: 0 }).buttons", "0");
 shouldBe("new MouseEvent('eventType', { buttons: 1 }).buttons", "1");
 shouldBe("new MouseEvent('eventType', { buttons: 65534 }).buttons", "65534");
 
-// Numbers out of the unsigned short range.
+// Numbers out of the short range.
 // 2^{64}-1
 shouldBe("new MouseEvent('eventType', { buttons: 65535 }).buttons", "65535");
 shouldBe("new MouseEvent('eventType', { buttons: 9007199254740991 }).buttons", "65535");