Roll opus to opus-HEAD-66611f1.

third_party/opus/opus.gyp

 # Copyright (c) 2012 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.
 
 {
   'variables': {
     'conditions': [
-      ['target_arch=="arm" or target_arch=="arm64"', {
+      # TODO(wtc): change "mipselx" to "mipsel" in this file when the
+      # compilation errors in the MIPS optimizations are fixed.
+      ['target_arch=="arm" or target_arch=="arm64" or target_arch=="mipselx"', {
         'use_opus_fixed_point%': 1,
       }, {
         'use_opus_fixed_point%': 0,
       }],
       ['target_arch=="arm"', {
         'use_opus_arm_optimization%': 1,
       }, {
         'use_opus_arm_optimization%': 0,
       }],
+      ['target_arch=="mipselx"', {
+        'use_opus_mips_optimization%': 1,
+      }, {
+        'use_opus_mips_optimization%': 0,
+      }],
       ['target_arch=="arm" and (OS=="win" or OS=="android" or OS=="linux")', {
         # Based on the conditions in celt/arm/armcpu.c:
         # defined(_MSC_VER) || defined(__linux__).
         'use_opus_rtcd%': 1,
       }, {
         'use_opus_rtcd%': 0,
       }],
     ],
   },
   'targets': [
@@ skipping 89 matching lines @@
                     'OPUS_ARM_MAY_HAVE_MEDIA',
                     'OPUS_ARM_MAY_HAVE_NEON',
                     'OPUS_HAVE_RTCD',
                   ],
                   'includes': [
                     'opus_srcs_rtcd.gypi',
                   ],
                 }],
               ],
             }],
+            ['use_opus_mips_optimization==1', {
+              'defines': [
+                'MIPSr1_ASM',
+                'USE_ALLOCA',
+              ],
+
+              'includes': [
+                'opus_srcs_mips.gypi',
+              ],
+            }],
           ],
         }],
       ],
     },  # target opus
     {
       'target_name': 'opus_compare',
       'type': 'executable',
       'dependencies': [
         'opus'
       ],
@@ skipping 48 matching lines @@
       'sources': [
         'src/src/opus_demo.c',
       ],
       'include_dirs': [
         'src/celt',
         'src/silk',
       ],
     },  # target opus_demo
   ]
 }