Revert of Always call LayerImpl::SetDebugInfo in debug builds.

Revert of Always call LayerImpl::SetDebugInfo in debug builds. (patchset #1 id:1 of https://codereview.chromium.org/1414503005/ )

Reason for revert:
This broke ContextLost.WebGLContextLostInHiddenTab in context_lost_tests on the GPU debug bots. e.g.:
http://build.chromium.org/p/chromium.gpu/builders/Linux%20Debug%20%28NVIDIA%29/builds/52223
http://build.chromium.org/p/chromium.gpu/builders/Mac%20Retina%20Debug/builds/40211
http://build.chromium.org/p/chromium.gpu/builders/Mac%2010.10%20Debug%20%28ATI%29/builds/5820

Verified locally that reverting this fixes the test.

Original issue's description:
> Always call LayerImpl::SetDebugInfo in debug builds.
>
> This makes debugging easier. :)
>
> Committed: https://crrev.com/b7e166f0dba00d2c9737d2ece0d7b22976506de2
> Cr-Commit-Position: refs/heads/master@{#354927}

TBR=enne@chromium.org,skobes@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed: https://crrev.com/d19e88b1f9898699ae510dc89c3f3dacdab59637
Cr-Commit-Position: refs/heads/master@{#355057}

[ajuma, 2015-10-20 14:45:25]

Created Revert of Always call LayerImpl::SetDebugInfo in debug builds.

[commit-bot: I haz the power, 2015-10-20 14:45:30]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1413363002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1413363002/1

[commit-bot: I haz the power, 2015-10-20 14:46:25]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-10-20 14:47:41]

Patchset 1 (id:??) landed as
https://crrev.com/d19e88b1f9898699ae510dc89c3f3dacdab59637
Cr-Commit-Position: refs/heads/master@{#355057}