Remove most clang-cl special cases from cpu_id.cc

Remove most clang-cl special cases from cpu_id.cc

They are not needed, and due to them there was a call to _xgetbv()
without a declaration of the function.  This used to work because we
implicitly included intrin.h in all translation units with clang-cl, but
we want to stop doing that.

BUG=chromium:592745
R=fbarchard@google.com

Committed: https://chromium.googlesource.com/libyuv/libyuv/+/76aee8ced7ca74c724d69c1dcf9891348450c8e8

[Nico, 2016-03-08 20:56:03]

thakis@chromium.org changed reviewers:
+ fbarchard@chromium.org

[Nico, 2016-03-08 20:56:03]

If this is ok, please land it for me too.

[fbarchard1, 2016-03-10 18:23:48]

fbarchard@google.com changed reviewers:
+ fbarchard@google.com

[fbarchard1, 2016-03-10 18:23:48]

lgtm

[fbarchard1, 2016-03-10 22:01:29]

Description was changed from

==========
Remove most clang-cl special cases from cpu_id.cc

They are not needed, and due to them there was a call to _xgetbv()
without a declaration of the function.  This used to work because we
implicitly included intrin.h in all translation units with clang-cl, but
we want to stop doing that.

BUG=chromium:592745
==========

to

==========
Remove most clang-cl special cases from cpu_id.cc

They are not needed, and due to them there was a call to _xgetbv()
without a declaration of the function.  This used to work because we
implicitly included intrin.h in all translation units with clang-cl, but
we want to stop doing that.

BUG=chromium:592745
R=fbarchard@google.com

Committed:
https://chromium.googlesource.com/libyuv/libyuv/+/76aee8ced7ca74c724d69c1dcf9...
==========

[fbarchard1, 2016-03-10 22:01:30]

Committed patchset #1 (id:1) manually as
76aee8ced7ca74c724d69c1dcf9891348450c8e8 (presubmit successful).