This changes libyuv to use the DEPS file for pulling
down all dependencies (thus no Chromium checkout is needed any more).

Add tools_libyuv directory to contain libyuv-specific tools
(needed to avoid name collision with the now DEPSed tools/ directory
of Chromium, which is needed by the toolchain).
Add tools_libyuv/autoroller/roll_deps.py script to automatically
roll all entries in the DEPS file (copied from WebRTC).

third_party/ is now DEPSed as well, including the gtest configuration
headers that used to live inside the libyuv repo.

Add PRESUBMIT.py with a few simple checks + execution of PyLint and
Python unit tests. For PyLint a pylintrc file was also added.

Valgrind in tools_libyuv/valgrind was updated to make PRESUBMIT.py pass
and remove old tsan suppressions (not used).

Removed util/android/test_runner.py since it's no longer needed.

Buildbot changes in https://chromium-review.googlesource.com/436464 
are needed for the Memcheck bot to go green.

BUG=libyuv:676
NOTRY=True

Change-Id: Ib86fea2905a1656bba2933703ce5a59d29d8db6b
Reviewed-on: https://chromium-review.googlesource.com/436264
Commit-Queue: Henrik Kjellander <kjellander@chromium.org>
Reviewed-by: Frank Barchard <fbarchard@google.com>

BUG=None
TEST=Untested

Change-Id: I8ab95654255d1aa9cf05a664ecf59ee6c0757e66
Reviewed-on: https://chromium-review.googlesource.com/434941Reviewed-by: Henrik Kjellander <kjellander@chromium.org>
Commit-Queue: Frank Barchard <fbarchard@google.com>

ARGBToUV_C and ARGBToUVJ_C are generated functions with subtle
difference in rounding.  Adding comment to make them easier to find.

TBR=kjellander@chromium.org
BUG=libyuv:634
TEST=untested

Change-Id: I9912d256a1e04c58475d33bdb472c37484f6cab9
Reviewed-on: https://chromium-review.googlesource.com/434980Reviewed-by: Frank Barchard <fbarchard@google.com>
Commit-Queue: Frank Barchard <fbarchard@google.com>

cd ~/my_projects/libyuv
git pull
mkdir cbuild  # (for out-of-source builds)
cd cbuild
cmake -DCMAKE_BUILD_TYPE=Release ..
make -j4
make package

BUG=libyuv:673
TEST=make package

Change-Id: Ia449cbfd0bc118cc90c8648f8199a0526b7ae2a2
Reviewed-on: https://chromium-review.googlesource.com/433440
Commit-Queue: Frank Barchard <fbarchard@google.com>
Reviewed-by: Henrik Kjellander <kjellander@chromium.org>

BUG=libyuv:643
TEST=gn gen out/Release "--args=is_debug=false target_os=\"ios\" ios_enable_code_signing=false target_cpu=\"arm64\"" && ninja -v -C out/Release libyuv_unittest
R=kjellander@chromium.org

Review URL: https://codereview.chromium.org/2450853003 .

YUV 411 is very uncommon format.  Remove support.

Update documentation to reflect that 411 is deprecated.

Simplify tests for YUV to only test with the new side by side YUV but keep old 3 plane test around with a macro for now.

BUG=libyuv:645
R=kjellander@chromium.org

Review URL: https://codereview.chromium.org/2406123002 .

R=fbarchard@google.com
BUG=libyuv:634

Performance gains as below,

YUY2ToI422, YUY2ToI420 :-

YUY2ToYRow_MSA          : ~10x
YUY2ToUVRow_MSA         : ~11x
YUY2ToUV422Row_MSA      : ~9x
YUY2ToYRow_Any_MSA      : ~6x
YUY2ToUVRow_Any_MSA     : ~5x
YUY2ToUV422Row_Any_MSA  : ~4x

UYVYToI422, UYVYToI420 :-

UYVYToYRow_MSA          : ~10x
UYVYToUVRow_MSA         : ~11x
UYVYToUV422Row_MSA      : ~9x
UYVYToYRow_Any_MSA      : ~6x
UYVYToUVRow_Any_MSA     : ~5x
UYVYToUV422Row_Any_MSA  : ~4x

Review URL: https://codereview.chromium.org/2397693002 .

Optimize max enables O2 for official builds.  Normally release builds
are O2 but the official build is Os, affecting performance.
The GYP file was previously updated to enable optimize max,
which enables ltcg and O2.

Documentation updated to show GN builds in docs/getting_started.md

BUG=libyuv:642
R=kjellander@chromium.org

Review URL: https://codereview.chromium.org/2386093003 .

As per the preparation patch added in Chromium sources at,
2150943003: Add MIPS SIMD Arch (MSA) build flags for GYP/GN builds

This patch adds first MSA optimized function in libYUV project.

BUG=libyuv:634
R=fbarchard@google.com

Review URL: https://codereview.chromium.org/2285683002 .

BUG=libyuv:636
TESTED=try bots
R=kjellander@chromium.org

Review URL: https://codereview.chromium.org/2339813002 .

The conversion from NV12 and other Bi or Tri planar formats, differs only in the UV handling.  The helper function supports passing a NULL for the dst_y channel indicating you only want to do the UV conversion.

TBR=harryjin@google.com
TEST=LibYUVConvertTest.NV12ToI420_NullY (601 ms)
BUG=libyuv:626

Review URL: https://codereview.chromium.org/2276703002 .

BUG=libyuv:626

Review URL: https://codereview.chromium.org/2225763003 .

Add a lot of new dependencies for the Android toolchain
to setup_links.py (added for WebRTC in https://codereview.webrtc.org/2190893002
and https://codereview.webrtc.org/2215633002).

There was no other way to get the Android test to build
than renaming the APK to yuv_unittests. That made it possible
to use build/apk_test.gypi (there's some bug somewhere that assumes
names doesn't start with "lib", see http://crbug.com/543820).

TBR=fbarchard@chromium.org
BUG=libyuv:626

Review URL: https://codereview.chromium.org/2201893007 .

upscale a YUV image.  observe change in hue.. green especially.
disable ScaleFilterCols_SSSE3, falling back on ScaleFilterCols_C
observe hue.. green especially, is better.

disable HAS_SCALEFILTERCOLS_SSSE3

R=harryjin@google.com
BUG=libyuv:605

Review URL: https://codereview.chromium.org/2080663003 .

cpu_info_ is zero for uninitialized state and all bits are off, disabling all cpu optimizations.
the 1 bit indicates cpu_info_ is initialized avoiding calling the detection code again for performance.

MaskCpuFlags initializes the cpu ignoring existing flags, then masks with the supplied flags and stores to cpu_info_.
As a mask, -1 has no effect, enabling all cpu features that were detected, but nothing that wasnt detected.
Setting to 0 will cause the next call to re-initialize the cpu, which is same as enabling all features.
Setting mask to 1 will turn off all cpu features but keep the initialized bit on, so the next detection call wont reinitialize and the cpu features are all disabled.

So normal behavior for command line and programatic masking is:
1 = C
-1 = SIMD

TBR=harryjin@google.com
BUG=libyuv:600
TESTED=out64/Release/bin/run_libyuv_unittest -s libyuv_unittest --verbose --release --gtest_filter=*ARGBExtractAlpha* -a "--libyuv_width=1280 --libyuv_height=720 --libyuv_repeat=9999 --libyuv_flags=1 --libyuv_cpu_info=1"

Review URL: https://codereview.chromium.org/2042933002 .

R=kjellander@chromium.org

BUG=libyuv:583
TESTED=gn gen out/Debug

Review URL: https://codereview.chromium.org/1870473002 .

Name of objdump tool updated.

TBR=kjellander@chromium.org
BUG=none

Review URL: https://codereview.chromium.org/1715743003 .

Review URL: https://codereview.chromium.org/1727993002 .

Name of objdump tool updated.

R=kjellander@chromium.org
BUG=none

Review URL: https://codereview.chromium.org/1715743003 .

document play services update

R=jkellander@chromium.org
BUG=none

Review URL: https://codereview.chromium.org/1712463002 .

R=jkellander@chromium.org
BUG=none

Review URL: https://codereview.chromium.org/1703243003 .

Make environment variables match ifdefs with one SIMD instruction set word
as suffix for functions, ifdefs and environment variables.

R=kjellander@chromium.org
BUG=libyuv:486

Review URL: https://codereview.chromium.org/1704053002 .

This is based on today's content at
https://code.google.com/p/libyuv/w/list

BUG=chromium:587193

Review URL: https://codereview.chromium.org/1703653002 .