DevTools: Rename WI.Color's toString(format) -> asString(format)

DevTools: Rename WI.Color's toString(format) -> asString(format)

toString(format) is an override of the Object's method with
a different signature, which is an error.

R=eustas
NOTRY=true

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=185936

[eustas, 2014-11-25 08:58:14]

lgtm

[apavlov, 2014-11-25 08:59:10]

The CQ bit was checked by apavlov@chromium.org

[apavlov, 2014-11-25 08:59:13]

The CQ bit was unchecked by apavlov@chromium.org

[apavlov, 2014-11-25 09:10:54]

The CQ bit was checked by apavlov@chromium.org

[commit-bot: I haz the power, 2014-11-25 09:12:03]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/756913002/20001

[apavlov, 2014-11-25 10:28:59]

The CQ bit was unchecked by apavlov@chromium.org

[apavlov, 2014-11-25 10:29:00]

The CQ bit was checked by apavlov@chromium.org

[commit-bot: I haz the power, 2014-11-25 10:29:08]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/756913002/20001

[commit-bot: I haz the power, 2014-11-25 10:29:52]

Committed patchset #2 (id:20001) as
https://src.chromium.org/viewvc/blink?view=rev&revision=185936