Revert of Roll opus to opus-HEAD-66611f1.

third_party/opus/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/mips.gni")
 
 # If fixed point implementation shall be used (otherwise float).
-# TODO(wtc): change "mipselx" to "mipsel" in this file when the compilation
-# errors in the MIPS optimizations are fixed.
-use_opus_fixed_point =
-    cpu_arch == "arm" || cpu_arch == "arm64" || cpu_arch == "mipselx"
+use_opus_fixed_point = cpu_arch == "arm" || cpu_arch == "arm64"
 
 # If ARM optimizations shall be used to accelerate performance.
 use_opus_arm_optimization = cpu_arch == "arm"
 
-# If MIPS optimizations shall be used to accelerate performance.
-use_opus_mips_optimization = cpu_arch == "mipselx"
-
 # If OPUS Run Time CPU Detections (RTCD) shall be used.
 # Based on the conditions in celt/arm/armcpu.c:
 # defined(_MSC_VER) || defined(__linux__).
 use_opus_rtcd = cpu_arch == "arm" && (is_win || is_android || is_linux)
 
 config("opus_config") {
   include_dirs = [ "src/include" ]
 }
 
 if (use_opus_rtcd) {
@@ skipping 105 matching lines @@
         "OPUS_ARM_MAY_HAVE_MEDIA",
         "OPUS_ARM_MAY_HAVE_NEON",
         "OPUS_HAVE_RTCD",
       ]
 
       deps = [
         ":convert_rtcd_assembler",
       ]
     }
   }
-
-  if (use_opus_mips_optimization) {
-    sources += [
-      "src/celt/mips/celt_mipsr1.h",
-      "src/celt/mips/fixed_generic_mipsr1.h",
-      "src/celt/mips/kiss_fft_mipsr1.h",
-      "src/celt/mips/mdct_mipsr1.h",
-      "src/celt/mips/pitch_mipsr1.h",
-      "src/celt/mips/vq_mipsr1.c",
-      "src/celt/mips/vq_mipsr1.h",
-      "src/silk/fixed/mips/noise_shape_analysis_FIX_mipsr1.h",
-      "src/silk/fixed/mips/prefilter_FIX_mipsr1.h",
-      "src/silk/fixed/mips/warped_autocorrelation_FIX_mipsr1.h",
-      "src/silk/mips/NSQ_del_dec_mipsr1.h",
-      "src/silk/mips/macros_mipsr1.h",
-      "src/silk/mips/sigproc_fix_mipsr1.h",
-    ]
-
-    defines += [
-      "MIPSr1_ASM",
-      "USE_ALLOCA",
-    ]
-  }
 }
 
 executable("opus_compare") {
   sources = [
     "src/src/opus_compare.c",
   ]
 
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [ "//build/config/compiler:no_chromium_code" ]
 
@@ skipping 37 matching lines @@
     libs = [ "log" ]
   }
   if (is_clang) {
     cflags = [ "-Wno-absolute-value" ]
   }
 
   deps = [
     ":opus",
   ]
 }