Remove runtime CPU detection for SSE optimized media/ methods.

Remove runtime CPU detection for SSE optimized media/ methods.

SSE2 is now the baseline for X86 platforms.

BUG=378608
TEST=compiles

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=273964

[DaleCurtis, 2014-05-29 22:03:47]

+rileya since I know you love x86 assembly :)

[rileya (GONE FROM CHROMIUM), 2014-05-30 01:12:08]

On 2014/05/29 22:03:47, DaleCurtis wrote:
> +rileya since I know you love x86 assembly :)

lgtm with one slightly-off-topic comment.

[rileya (GONE FROM CHROMIUM), 2014-05-30 01:12:29]

Actually publish the above-mentioned comment...

https://codereview.chromium.org/308003004/diff/20001/media/base/sinc_resample...
File media/base/sinc_resampler.cc (right):

https://codereview.chromium.org/308003004/diff/20001/media/base/sinc_resample...
media/base/sinc_resampler.cc:367: #elif defined(ARCH_CPU_ARM_FAMILY) &&
defined(USE_NEON)
Not too relevant to this CL, but iirc we don't set USE_NEON in official builds
due to some specific chipsets not supporting it (Tegra 2 I think). It might be
worth doing runtime detection if that is the case (I seem to recall some sort of
'arm_optionally_use_neon' gyp flag that might be relevant there).

This is my recollection from probably 6 months ago though, so things may have
changed since then.

[DaleCurtis, 2014-05-30 01:22:50]

Per offline discussion, some ChromeOS boards are definitely setting arm_neon=1,
though notably Android does not.  Though Android does not use this code unless
explicitly requested by WebAudio or WebRTC since we use pass-through
AudioParameters there.

[DaleCurtis, 2014-05-30 01:22:59]

The CQ bit was checked by dalecurtis@chromium.org

[commit-bot: I haz the power, 2014-05-30 01:25:13]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/dalecurtis@chromium.org/308003004/20001

[commit-bot: I haz the power, 2014-05-30 06:06:17]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  linux_chromium_chromeos_clang_dbg on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/linux_chromium_chrome...)
  linux_chromium_chromeos_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/linux_chromium_chrome...)
  linux_chromium_clang_dbg on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/linux_chromium_clang_...)
  linux_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/linux_chromium_rel/bu...)
  mac_chromium_compile_dbg on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/mac_chromium_compile_...)
  mac_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/mac_chromium_rel/buil...)
  win_chromium_compile_dbg on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/win_chromium_compile_...)
  win_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/win_chromium_rel/buil...)
  win_chromium_x64_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/win_chromium_x64_rel/...)
  linux_gpu on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/linux_gpu/builds/...)
  mac_gpu on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/mac_gpu/builds/10833)
  win_gpu on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/win_gpu/builds/13905)

[commit-bot: I haz the power, 2014-05-30 06:26:25]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-05-30 06:26:26]

Try jobs failed on following builders:
  mac_gpu on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/mac_gpu/builds/10868)

[DaleCurtis, 2014-05-30 18:05:33]

The CQ bit was checked by dalecurtis@chromium.org

[commit-bot: I haz the power, 2014-05-30 18:07:43]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/dalecurtis@chromium.org/308003004/40001

[DaleCurtis, 2014-05-30 19:44:03]

The CQ bit was checked by dalecurtis@chromium.org

[commit-bot: I haz the power, 2014-05-30 19:45:57]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/dalecurtis@chromium.org/308003004/60001

[commit-bot: I haz the power, 2014-05-31 00:50:55]

Change committed as 273964