Fix debug-debugger.js wrt strict mode.

Fix debug-debugger.js wrt strict mode.

R=rossberg@chromium.org
BUG=v8:3790
LOG=N

Committed: https://crrev.com/10a58904ac845cf97c21116c1d13d61e1afe8f34
Cr-Commit-Position: refs/heads/master@{#25971}

[rossberg, 2015-01-07 12:28:16]

lgtm

[Yang, 2015-01-07 12:40:04]

The CQ bit was checked by yangguo@chromium.org

[commit-bot: I haz the power, 2015-01-07 12:41:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/813873007/1

[commit-bot: I haz the power, 2015-01-07 13:08:17]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-01-07 13:08:32]

Patchset 1 (id:??) landed as
https://crrev.com/10a58904ac845cf97c21116c1d13d61e1afe8f34
Cr-Commit-Position: refs/heads/master@{#25971}

[noordhuis, 2015-01-18 17:17:44]

On 2015/01/07 13:08:32, I haz the power (commit-bot) wrote:
> Patchset 1 (id:??) landed as
> https://crrev.com/10a58904ac845cf97c21116c1d13d61e1afe8f34
> Cr-Commit-Position: refs/heads/master@{#25971}

Yang, could this fix be back-ported to the 4.1 branch?  Thanks!

[Yang, 2015-01-19 07:33:48]

On 2015/01/18 17:17:44, info1 wrote:
> On 2015/01/07 13:08:32, I haz the power (commit-bot) wrote:
> > Patchset 1 (id:??) landed as
> > https://crrev.com/10a58904ac845cf97c21116c1d13d61e1afe8f34
> > Cr-Commit-Position: refs/heads/master@{#25971}
> 
> Yang, could this fix be back-ported to the 4.1 branch?  Thanks!

Back merged to 4.1.0.8