Revert of Do not allow asan_symbolize.py to fall back to addr2line/atos.

Revert of Do not allow asan_symbolize.py to fall back to addr2line/atos. (patchset #1 id:1 of https://codereview.chromium.org/983083004/)

Reason for revert:
Turns out the fall back to addr2line happens routinely. We need to fix that before proceeding with this change.

Original issue's description:
> Do not allow asan_symbolize.py to fall back to addr2line/atos.
>
> For performance reasons we want to stick to llvm-symbolizer.
> This also rolls the third-party asan_symbolize.py to r231492.
>
> BUG=415179
> TBR=glider@chromium.org
> NOTRY=true
>
> Committed: https://crrev.com/2ee9a8ae1e39433fc8df07c27256963715747bbb
> Cr-Commit-Position: refs/heads/master@{#319460}

TBR=glider@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=415179
Committed: https://crrev.com/a5ffcd6982734e6429518c63fa42c02339eae74b
Cr-Commit-Position: refs/heads/master@{#320955}

[earthdok, 2015-03-17 19:17:02]

Created Revert of Do not allow asan_symbolize.py to fall back to addr2line/atos.

[commit-bot: I haz the power, 2015-03-17 19:20:02]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1017793002/1

[commit-bot: I haz the power, 2015-03-17 19:24:37]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-17 19:25:12]

Patchset 1 (id:??) landed as
https://crrev.com/a5ffcd6982734e6429518c63fa42c02339eae74b
Cr-Commit-Position: refs/heads/master@{#320955}