Revert "Roll ANGLE 524e3bde19..6bd5831261"

Revert "Roll ANGLE 524e3bde19..6bd5831261"

Reason for revert:
This is causing compilation error on chromiumos builds.

bot/chrome_root/src/third_party/angle/src/common/debug.h:147:42: error: missing binary operator before token "("
chromeos-chrome-43.0.2337.0_alpha-r1:  #elif defined(__clang__) && __has_feature(cxx_static_assert)

see crbug.com/468139 for more detials.

>    Roll ANGLE 524e3bde19..6bd5831261
>
>    https://chromium.googlesource.com/angle/angle/+log/524e3bde19..6bd5831261
>
>    BUG=466735, 466704
>
>    Review URL: https://codereview.chromium.org/1011213002
>
>    Cr-Commit-Position: refs/heads/master@{#320988}
BUG=466735, 466704, 468139
TBR=jmadill@chromium.org

Committed: https://crrev.com/98f9a6bdb1110654e8c6eecc74aa437b8a6b89c1
Cr-Commit-Position: refs/heads/master@{#321055}

[oshima, 2015-03-17 23:49:22]

The CQ bit was checked by oshima@chromium.org

[commit-bot: I haz the power, 2015-03-17 23:50:09]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1009543005/1

[commit-bot: I haz the power, 2015-03-18 02:19:19]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-18 02:20:25]

Patchset 1 (id:??) landed as
https://crrev.com/98f9a6bdb1110654e8c6eecc74aa437b8a6b89c1
Cr-Commit-Position: refs/heads/master@{#321055}