libvpx: Pull from upstream

libvpx: Pull from upstream

Current HEAD: c731d6a4f19eea861ceb2ff31399420b2452eb74
git log from upstream:
395f2e8 vp8 encoder: remove vp8_yv12_copy_partial_frame_neon
980abf6 Fixing Mac OS build.
fcd431f libyuv: cherry-pick MSVC arm build fix
1f19ebb Replacing vp9_get_mb_ss_sse2 asm implementation with intrinsics.
1dd9a63 Correct the mode decisions in special cases
1100e26 Removing postproc mmx code.
c97f5e8 vp8 common: change 'HAVE_NEON_ASM' to 'HAVE_NEON' for compiling functions of NEON intrinsics.
a808344 fix x86-darwin* build
35fadf1 bilinearpredict_neon: fix type conversion warnings
bb4950d vp9: correct context buffer resize check
440f509 vp9: fail decode if block/frame refs are corrupt
dbdb87b Fix a visual studio warning
d435148 Enable adaptive motion search for ARF coding
b1153f3 Map motion magnitude in VP9 denoiser.
7897059 Adding temp cpi var.
91998e6 Removing sz member from vpx_codec_priv.
d75266f Update the condition when COPY_BLOCK is chosen.
4909435 Removing unused function prototypes.
202edb3 Actually resetting random generator for all variance test cases.
e30f769 Fix a bug in VP9 denoiser.
ec94967 Revert "Revert "VP8 for ARMv8 by using NEON intrinsics 10""
a51704d vp8 common: change 'HAVE_NEON_ASM' to 'HAVE_NEON' for compiling idct_blk_neon.c.
0002da3 arm: Fix building vp8_subpixelvariance_neon.c with MSVC
48197f0 Adding sse2 variant for vp9_mse{8x8, 8x16, 16x8}.
<...>

TBR=tomfinegan@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=291859

[wwcv, 2014-09-08 18:46:41]

Committed patchset #1 (id:1) manually as r291859 (presubmit successful).

[Tom Finegan, 2014-09-09 20:05:15]

On 2014/09/08 18:46:41, wwcv wrote:
> Committed patchset #1 (id:1) manually as r291859 (presubmit successful).

lgtm [rs]