Revert of Catch uncaught promise rejections from V8 and log to console.

Revert of Catch uncaught promise rejections from V8 and log to console. (patchset #13 id:520001 of https://codereview.chromium.org/625943002/)

Reason for revert:
This is likely the cause of breakage for these browser_tests:
ManageProfileUITest.Create_NameUpdateOnAvatarSelected
ManageProfileUITest.Create_NoNameUpdateOnAvatarSelectedAfterRevert
ManageProfileUITest.Create_NoNameUpdateOnAvatarSelectedAfterEdit


https://build.chromium.org/p/chromium.mac/builders/Mac10.6%20Tests%20%281%29/builds/56670

Original issue's description:
> Catch uncaught promise rejections from V8 and log to console.
> 
> Print error messages to DevTools console for rejected Promises that are unhandled by the platform end-of-turn.
> 
> BUG=393913
> R=pfeldman, yurys
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=183464
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=183598

TBR=pfeldman@chromium.org,yurys@chromium.org,jl@opera.com,aandrey@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=393913
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=183611

[cbiesinger, 2014-10-13 16:17:11]

Created Revert of Catch uncaught promise rejections from V8 and log to console.

[commit-bot: I haz the power, 2014-10-13 16:18:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/650203003/1

[commit-bot: I haz the power, 2014-10-13 16:19:17]

Committed patchset #1 (id:1) as 183611

[aandrey, 2014-10-13 19:28:40]

aandrey@chromium.org changed reviewers:
+ treib@chromium.org

[aandrey, 2014-10-13 19:28:40]

Seems like the problem is in the tests, as there should not be unhandled promise
rejections (as well as uncaught exceptions). The reverted patch just uncovered
the problem.