GN: mac host and armv7 target

third_party/libwebp/BUILD.gn

Index: third_party/libwebp/BUILD.gn
diff --git a/third_party/libwebp/BUILD.gn b/third_party/libwebp/BUILD.gn
index 7f7901e75400ace5bacf11a92378fe74f20ef99b..ec51cd3b381470b3d9b9704163acac772dfca7d7 100644
--- a/third_party/libwebp/BUILD.gn
+++ b/third_party/libwebp/BUILD.gn
@@ -11,6 +11,12 @@ import("../third_party.gni")
 third_party("libwebp") {
   public_include_dirs = [ "../externals/libwebp/src" ]
 
+  if (is_android) {
+    deps = [
+      "//third_party/cpu-features",
+    ]
+  }
+
   defines = [
     # WebP naturally decodes to RGB_565, and we work with BGR_565.
     # This makes WebP decode to BGR_565 when we ask for RGB_565.
@@ -32,39 +38,56 @@ third_party("libwebp") {
     "../externals/libwebp/src/dec/webp.c",
     "../externals/libwebp/src/demux/demux.c",
     "../externals/libwebp/src/dsp/alpha_processing.c",
+    "../externals/libwebp/src/dsp/alpha_processing_mips_dsp_r2.c",
     "../externals/libwebp/src/dsp/alpha_processing_sse2.c",
     "../externals/libwebp/src/dsp/alpha_processing_sse41.c",
     "../externals/libwebp/src/dsp/argb.c",
+    "../externals/libwebp/src/dsp/argb_mips_dsp_r2.c",
     "../externals/libwebp/src/dsp/argb_sse2.c",
     "../externals/libwebp/src/dsp/cost.c",
+    "../externals/libwebp/src/dsp/cost_mips32.c",
+    "../externals/libwebp/src/dsp/cost_mips_dsp_r2.c",
     "../externals/libwebp/src/dsp/cost_sse2.c",
     "../externals/libwebp/src/dsp/cpu.c",
     "../externals/libwebp/src/dsp/dec.c",
     "../externals/libwebp/src/dsp/dec_clip_tables.c",
+    "../externals/libwebp/src/dsp/dec_mips32.c",
+    "../externals/libwebp/src/dsp/dec_mips_dsp_r2.c",
     "../externals/libwebp/src/dsp/dec_neon.c",
     "../externals/libwebp/src/dsp/dec_sse2.c",
     "../externals/libwebp/src/dsp/dec_sse41.c",
     "../externals/libwebp/src/dsp/enc.c",
     "../externals/libwebp/src/dsp/enc_avx2.c",
+    "../externals/libwebp/src/dsp/enc_mips32.c",
+    "../externals/libwebp/src/dsp/enc_mips_dsp_r2.c",
     "../externals/libwebp/src/dsp/enc_neon.c",
     "../externals/libwebp/src/dsp/enc_sse2.c",
     "../externals/libwebp/src/dsp/enc_sse41.c",
     "../externals/libwebp/src/dsp/filters.c",
+    "../externals/libwebp/src/dsp/filters_mips_dsp_r2.c",
     "../externals/libwebp/src/dsp/filters_sse2.c",
     "../externals/libwebp/src/dsp/lossless.c",
     "../externals/libwebp/src/dsp/lossless_enc.c",
+    "../externals/libwebp/src/dsp/lossless_enc_mips32.c",
+    "../externals/libwebp/src/dsp/lossless_enc_mips_dsp_r2.c",
     "../externals/libwebp/src/dsp/lossless_enc_neon.c",
     "../externals/libwebp/src/dsp/lossless_enc_sse2.c",
     "../externals/libwebp/src/dsp/lossless_enc_sse41.c",
+    "../externals/libwebp/src/dsp/lossless_mips_dsp_r2.c",
     "../externals/libwebp/src/dsp/lossless_neon.c",
     "../externals/libwebp/src/dsp/lossless_sse2.c",
     "../externals/libwebp/src/dsp/rescaler.c",
+    "../externals/libwebp/src/dsp/rescaler_mips32.c",
+    "../externals/libwebp/src/dsp/rescaler_mips_dsp_r2.c",
     "../externals/libwebp/src/dsp/rescaler_neon.c",
     "../externals/libwebp/src/dsp/rescaler_sse2.c",
     "../externals/libwebp/src/dsp/upsampling.c",
+    "../externals/libwebp/src/dsp/upsampling_mips_dsp_r2.c",
     "../externals/libwebp/src/dsp/upsampling_neon.c",
     "../externals/libwebp/src/dsp/upsampling_sse2.c",
     "../externals/libwebp/src/dsp/yuv.c",
+    "../externals/libwebp/src/dsp/yuv_mips32.c",
+    "../externals/libwebp/src/dsp/yuv_mips_dsp_r2.c",
     "../externals/libwebp/src/dsp/yuv_sse2.c",
     "../externals/libwebp/src/enc/alpha.c",
     "../externals/libwebp/src/enc/analysis.c",