Fix a broken WebGL layout test by using testRunner.displayAsyncThen().

Fix a broken WebGL layout test by using testRunner.displayAsyncThen().

The expected result of fast/canvas/webgl/draw-webgl-to-canvas-2d.html
is failure because this test uses setTimeout to go to next frame.
testRunner.displayAsyncThen() can fix this test.

BUG=423674
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=183817

[dshwang, 2014-10-15 08:42:47]

dongseong.hwang@intel.com changed reviewers:
+ kbr@chromium.org

[dshwang, 2014-10-15 08:43:13]

Hi kbr@, could you review?

[Ken Russell (switch to Gerrit), 2014-10-16 03:05:03]

LGTM overall but one comment. BTW, please include bajones and zmo on WebGL
reviews.

https://codereview.chromium.org/655133003/diff/20001/LayoutTests/fast/canvas/...
File LayoutTests/fast/canvas/webgl/draw-webgl-to-canvas-2d.html (right):

https://codereview.chromium.org/655133003/diff/20001/LayoutTests/fast/canvas/...
LayoutTests/fast/canvas/webgl/draw-webgl-to-canvas-2d.html:114:
setTimeout(asyncTest, 100);
Can this code path use requestAnimationFrame instead?

[dshwang, 2014-10-16 12:16:50]

dongseong.hwang@intel.com changed reviewers:
+ bajones@chromium.org, zmo@chromium.org

[dshwang, 2014-10-16 12:26:48]

On 2014/10/16 03:05:03, Ken Russell wrote:
> LGTM overall but one comment. BTW, please include bajones and zmo on WebGL
> reviews.

Yep, thanks. I'll ask them from now on.

>
https://codereview.chromium.org/655133003/diff/20001/LayoutTests/fast/canvas/...
> File LayoutTests/fast/canvas/webgl/draw-webgl-to-canvas-2d.html (right):
> 
>
https://codereview.chromium.org/655133003/diff/20001/LayoutTests/fast/canvas/...
> LayoutTests/fast/canvas/webgl/draw-webgl-to-canvas-2d.html:114:
> setTimeout(asyncTest, 100);
> Can this code path use requestAnimationFrame instead?

Done

[dshwang, 2014-10-16 12:26:53]

The CQ bit was checked by dongseong.hwang@intel.com

[commit-bot: I haz the power, 2014-10-16 12:27:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/655133003/40001

[commit-bot: I haz the power, 2014-10-16 14:12:10]

Committed patchset #3 (id:40001) as 183817