Add option to ignore small pixel diffs for --validate. By default, right now we will default to max diff of 256, which means that for now we report all pixels that are not as expected and we do not error out. Ideally we will decrease the value of max diff to something that does not have visual impact, e.g. 10, then we will report small changes with the intensity under 10, but we will error out for anything larger. Review URL: https://codereview.appspot.com/7139043
Add option to ignore small pixel diffs for --validate. By default, right now we will default to max diff of 256, which means that for now we report all pixels that are not as expected and we do not error out. Ideally we will decrease the value of max diff to something that does not have visual impact, e.g. 10, then we will report small changes with the intensity under 10, but we will error out for anything larger.
Review URL: https://codereview.appspot.com/7139043

git-svn-id: e8541e15acce502a64c929015570ad1648e548cd@7218 2bbb7eff-a529-9590-31e7-b0007b416f81

Hankuo/color-emoji.skia,Hankuo/color-emoji.skia,hbwhlklive/color-emoji.skia,Frankie-666/color-emoji.skia,MatChung/color-emoji.skia,MatChung/color-emoji.skia,hbwhlklive/color-emoji.skia,Frankie-666/color-emoji.skia,Frankie-666/color-emoji.skia,hbwhlklive/color-emoji.skia,Hankuo/color-emoji.skia,hbwhlklive/color-emoji.skia,MatChung/color-emoji.skia,Hankuo/color-emoji.skia,hbwhlklive/color-emoji.skia,Frankie-666/color-emoji.skia,MatChung/color-emoji.skia,hbwhlklive/color-emoji.skia,Frankie-666/color-emoji.skia,Hankuo/color-emoji.skia,Frankie-666/color-emoji.skia,MatChung/color-emoji.skia,MatChung/color-emoji.skia,Hankuo/color-emoji.skia