Revert of mac: Add the flag "-gline-tables-only" to reduce dSYM size.

Revert of mac: Add the flag "-gline-tables-only" to reduce dSYM size. (patchset #4 id:60001 of https://codereview.chromium.org/1085843004/)

Reason for revert:
Reverting this CL because it doesn't actually reduce the dSYM size generated by dsymutil.

Original issue's description:
> mac: Add the flag "-gline-tables-only" to reduce dSYM size.
>
> The dSYM for Google Chrome Framework has grown to be larger than 4GB. dsymutil
> can't handle this. Reduce the amount of debug info output for official builds
> of Google Chrome. On my local machine, the dSYM is 10x smaller.
>
> BUG=479841
>
> Committed: https://crrev.com/c4fc98d94448349b8fcf3d0627a166c74caf7053
> Cr-Commit-Position: refs/heads/master@{#326445}

TBR=mark@chromium.org,rsesek@chromium.org,thakis@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=479841
Committed: https://crrev.com/5cf3c2e114b5d28a7997703ad6fea052a7a9f705
Cr-Commit-Position: refs/heads/master@{#326589}

[erikchen, 2015-04-23 18:28:12]

Created Revert of mac: Add the flag "-gline-tables-only" to reduce dSYM size.

[commit-bot: I haz the power, 2015-04-23 18:29:09]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1105703002/1

[commit-bot: I haz the power, 2015-04-23 18:32:50]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-23 18:34:58]

Patchset 1 (id:??) landed as
https://crrev.com/5cf3c2e114b5d28a7997703ad6fea052a7a9f705
Cr-Commit-Position: refs/heads/master@{#326589}