Revert of Enable ASan default options on Mac.

Revert of Enable ASan default options on Mac. (patchset #4 id:60001 of https://codereview.chromium.org/581983003/)

Reason for revert:
This CL broke ui_unittests on both Mac ASan and Mac ASan 64 bots:

/Volumes/data/bool/build/slave/Mac_ASan_Tests__2_/build/src/out/Release/ui_unittests --brave-new-test-launcher --test-launcher-bot-mode --verbose --test-launcher-print-test-stdio=always --gtest_print_time --test-launcher-summary-output=/tmp/tmpnPVxX8
dyld: Library not loaded: @executable_path/../Versions/1.0.0.0/ui_unittests Framework.framework/ui_unittests Framework
  Referenced from: /Volumes/data/bool/build/slave/Mac_ASan_Tests__2_/build/src/out/Release/ui_unittests
  Reason: image not found

http://build.chromium.org/p/chromium.memory/builders/Mac%20ASan%20Tests%20%282%29/builds/5393/steps/ui_unittests/logs/stdio

Original issue's description:
> Enable ASan default options on Mac.
>
> This CL links libsanitizer_options into every executable built with ASan on OSX.
> The existing implementation of __asan_default_options for Chromium.app is merged with that in sanitizer_options.cc
>
> Also now use_sanitizer_options is only set when building with sanitizers so that there isn't an unconditional dependency on an empty object file in every executable in non-sanitizer builds.
>
> BUG=302040
> R=cpu@chromium.org
>
> Committed: https://crrev.com/0640a5d19ef72aec62787423e8a7c78c4f62b955
> Cr-Commit-Position: refs/heads/master@{#295958}

TBR=cpu@chromium.org,earthdok@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=302040
Committed: https://crrev.com/5ed6fe035890a10288da3b99b2b46a7680b4636f
Cr-Commit-Position: refs/heads/master@{#295987}

[Alexander Potapenko, 2014-09-22 16:31:45]

Created Revert of Enable ASan default options on Mac.

[commit-bot: I haz the power, 2014-09-22 16:32:45]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/593683004/1

[commit-bot: I haz the power, 2014-09-22 16:34:58]

Committed patchset #1 (id:1) as 4ab1ad60316248fd1cdf7ef72e46ec6bfdd6084e

[commit-bot: I haz the power, 2014-09-22 16:35:52]

Patchset 1 (id:??) landed as
https://crrev.com/5ed6fe035890a10288da3b99b2b46a7680b4636f
Cr-Commit-Position: refs/heads/master@{#295987}