[ABANDONED] Disable AVX2 in libvpx for the SyzyAsan builds of Chrome.

third_party/libvpx/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/arm.gni")
 import("//build/config/android/config.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 import("//third_party/libvpx/libvpx_srcs.gni")
 import("//third_party/yasm/yasm_assemble.gni")
 
@@ skipping 293 matching lines @@
     }
   } else if (current_cpu == "arm64") {
     sources = libvpx_srcs_arm64
   }
 
   configs += [ ":libvpx_config" ]
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [ "//build/config/compiler:no_chromium_code" ]
   configs += [ ":libvpx_warnings" ]
   deps = []
-  if (current_cpu == "x86" || (current_cpu == "x64" && !is_msan)) {
+  if ((current_cpu == "x86" && !is_syzyasan) ||
+      (current_cpu == "x64" && !is_msan)) {
     deps += [
       ":libvpx_intrinsics_avx",
       ":libvpx_intrinsics_avx2",
       ":libvpx_intrinsics_mmx",
       ":libvpx_intrinsics_sse2",
       ":libvpx_intrinsics_sse4_1",
       ":libvpx_intrinsics_ssse3",
       ":libvpx_yasm",
     ]
   }
   if (cpu_arch_full == "arm-neon-cpu-detect") {
     deps += [ ":libvpx_intrinsics_neon" ]
   }
   if (is_android) {
     deps += [ "//third_party/android_tools:cpu_features" ]
   }
   if (current_cpu == "arm" && arm_assembly_sources != []) {
     deps += [ ":libvpx_assembly_arm" ]
   }
 
   public_configs = [ ":libvpx_external_config" ]
 }