Catch width overflow in ASAN using int64

This is related with our previous CL:
https://skia-review.googlesource.com/c/4628/

That previous CL fix won't pass the ASAN test (../../../include/core/SkRect.h:72:39: runtime error: signed integer overflow: 1 - -2147483648 cannot be represented in type 'int') so we use int64 in this CL.

BUG=skia:

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4785

Change-Id: I39f7329c427d49f4be07588f37120722ac9892c2
Reviewed-on: https://skia-review.googlesource.com/4785
Reviewed-by: Mike Reed <reed@google.com>
1 file changed