Enable ARM optimizations for Opus in iOS

third_party/opus/opus.gyp

Index: third_party/opus/opus.gyp
diff --git a/third_party/opus/opus.gyp b/third_party/opus/opus.gyp
index 326367ea33e09171c954fb70f901115cd91d8579..3b37f42b795afd53725485d7f70ac96d51dd4d70 100644
--- a/third_party/opus/opus.gyp
+++ b/third_party/opus/opus.gyp
@@ -5,13 +5,18 @@
 {
   'variables': {
     'conditions': [
-      ['(OS=="android" or chromeos==1) and target_arch=="arm"', {
+      ['((OS=="android" or chromeos==1) and target_arch=="arm") or (OS=="ios" and target_arch=="armv7")', {
         'use_opus_fixed_point%': 1,
         'use_opus_arm_optimization%': 1,
       }, {
         'use_opus_fixed_point%': 0,
         'use_opus_arm_optimization%': 0,
       }],
+      ['(OS=="android" or chromeos==1) and target_arch=="arm"', {
+        'use_opus_rtcd%': 1,
+      }, {
+        'use_opus_rtcd%': 0,
+      }],
     ],
   },
   'targets': [
@@ -85,14 +90,23 @@
                 'OPUS_ARM_ASM',
                 'OPUS_ARM_INLINE_ASM',
                 'OPUS_ARM_INLINE_EDSP',
-                'OPUS_ARM_MAY_HAVE_EDSP',
-                'OPUS_ARM_MAY_HAVE_MEDIA',
-                'OPUS_ARM_MAY_HAVE_NEON',
-                'OPUS_HAVE_RTCD',
               ],
               'includes': [
                 'opus_srcs_arm.gypi',
               ],
+              'conditions': [
+                ['use_opus_rtcd==1', {
+                  'defines': [
+                    'OPUS_ARM_MAY_HAVE_EDSP',
+                    'OPUS_ARM_MAY_HAVE_MEDIA',
+                    'OPUS_ARM_MAY_HAVE_NEON',
+                    'OPUS_HAVE_RTCD',
+                  ],
+                  'includes': [
+                    'opus_srcs_rtcd.gypi',
+                  ],
+                }],
+              ],
             }],
           ],
         }],