Revert of Use the upstream version of libwebp, v0.4.3. (patchset #6 id:70001 of https://codereview.chromium.org/1178013008/)

Reason for revert:
Breaking the build e.g. http://build.chromium.org/p/client.skia/builders/Perf-Mac10.8-Clang-MacMini4.1-GPU-GeForce320M-x86_64-Release/builds/1082/steps/build%20nanobench/logs/stdio

../../../third_party/externals/libwebp/src/utils/./endian_inl.h:51:10: error: use of unknown builtin '__builtin_bswap16' [-Wimplicit-function-declaration]
  return __builtin_bswap16(x);
         ^
1 error generated.

Original issue's description:
> Use the upstream version of libwebp, v0.4.3.
>
> DEPS:
> Update to pull v0.4.3 of libwebp from upstream
>
> gyp/libwebp.gyp:
> Add new files, as referenced by the gyp file used by Chromium.
>
> resource/tests:
> Add regression tests for particular images.
>
> BUG=skia:3442
> BUG=skia:3315
> BUG=skia:3429
>
> Committed: https://skia.googlesource.com/skia/+/3aa0fb4d80c76b559ff4b82d5e569993aea06da1

TBR=djsollen@google.com,jzern@chromium.org,msarett@google.com,emmaleer@google.com,scroggo@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:3442

Review URL: https://codereview.chromium.org/1223583004

1 files changed, 3 insertions, 9 deletions

diff --git a/gyp/libwebp.gyp b/gyp/libwebp.gyp
index da3741655a..70fffdd925 100644
--- a/gyp/libwebp.gyp
+++ b/gyp/libwebp.gyp
@@ -28,6 +28,7 @@
             '../third_party/externals/libwebp/src/dec/frame.c',
             '../third_party/externals/libwebp/src/dec/idec.c',
             '../third_party/externals/libwebp/src/dec/io.c',
+            '../third_party/externals/libwebp/src/dec/layer.c',
             '../third_party/externals/libwebp/src/dec/quant.c',
             '../third_party/externals/libwebp/src/dec/tree.c',
             '../third_party/externals/libwebp/src/dec/vp8.c',
@@ -56,20 +57,15 @@
               '../third_party/externals/libwebp',
           ],
           'sources': [
-            '../third_party/externals/libwebp/src/dsp/alpha_processing.c',
-            '../third_party/externals/libwebp/src/dsp/alpha_processing_sse2.c',
             '../third_party/externals/libwebp/src/dsp/cpu.c',
             '../third_party/externals/libwebp/src/dsp/dec.c',
-            '../third_party/externals/libwebp/src/dsp/dec_clip_tables.c',
             '../third_party/externals/libwebp/src/dsp/dec_sse2.c',
             '../third_party/externals/libwebp/src/dsp/enc.c',
             '../third_party/externals/libwebp/src/dsp/enc_sse2.c',
             '../third_party/externals/libwebp/src/dsp/lossless.c',
-            '../third_party/externals/libwebp/src/dsp/lossless_sse2.c',
             '../third_party/externals/libwebp/src/dsp/upsampling.c',
             '../third_party/externals/libwebp/src/dsp/upsampling_sse2.c',
             '../third_party/externals/libwebp/src/dsp/yuv.c',
-            '../third_party/externals/libwebp/src/dsp/yuv_sse2.c',
           ],
           'cflags': [ '-w' ],
           'xcode_settings': { 'WARNING_CFLAGS': [ '-w' ] },
@@ -92,7 +88,6 @@
               'sources': [
                 '../third_party/externals/libwebp/src/dsp/dec_neon.c',
                 '../third_party/externals/libwebp/src/dsp/enc_neon.c',
-                '../third_party/externals/libwebp/src/dsp/lossless_neon.c',
                 '../third_party/externals/libwebp/src/dsp/upsampling_neon.c',
               ],
               # behavior similar dsp_neon.c.neon in an Android.mk
@@ -121,8 +116,8 @@
             '../third_party/externals/libwebp/src/enc/frame.c',
             '../third_party/externals/libwebp/src/enc/histogram.c',
             '../third_party/externals/libwebp/src/enc/iterator.c',
+            '../third_party/externals/libwebp/src/enc/layer.c',
             '../third_party/externals/libwebp/src/enc/picture.c',
-            '../third_party/externals/libwebp/src/enc/picture_csp.c',
             '../third_party/externals/libwebp/src/enc/quant.c',
             '../third_party/externals/libwebp/src/enc/syntax.c',
             '../third_party/externals/libwebp/src/enc/token.c',
@@ -148,7 +143,6 @@
             '../third_party/externals/libwebp/src/utils/huffman_encode.c',
             '../third_party/externals/libwebp/src/utils/quant_levels.c',
             '../third_party/externals/libwebp/src/utils/quant_levels_dec.c',
-            '../third_party/externals/libwebp/src/utils/random.c',
             '../third_party/externals/libwebp/src/utils/rescaler.c',
             '../third_party/externals/libwebp/src/utils/thread.c',
             '../third_party/externals/libwebp/src/utils/utils.c',
@@ -180,7 +174,7 @@
         },
       ],
     }, {
-      # use_system_libwebp == 1
+      # use_system_libwep == 1
       'targets': [
         {
           'target_name': 'libwebp',