Inline GPU and opus GYP files into GN build.

third_party/opus/opus_srcs_rtcd.gypi

Index: third_party/opus/opus_srcs_rtcd.gypi
diff --git a/third_party/opus/opus_srcs_rtcd.gypi b/third_party/opus/opus_srcs_rtcd.gypi
deleted file mode 100644
index 4615e4a6262421d0f1de55530dca247e8eaa11d6..0000000000000000000000000000000000000000
--- a/third_party/opus/opus_srcs_rtcd.gypi
+++ /dev/null
@@ -1,37 +0,0 @@
-# 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.
-
-{
-  'sources': [
-    'src/celt/arm/arm_celt_map.c',
-    'src/celt/arm/armcpu.c',
-    'src/celt/arm/armcpu.h',
-    'src/celt/arm/celt_neon_intr.c',
-    'src/celt/arm/fft_arm.h',
-    'src/celt/arm/mdct_arm.h',
-    'src/celt/arm/pitch_arm.h',
-    'src/silk/arm/arm_silk_map.c',
-    'src/silk/arm/NSQ_neon.h',
-    'src/silk/arm/NSQ_neon.c',
-    '<(INTERMEDIATE_DIR)/celt_pitch_xcorr_arm_gnu.S',
-  ],
-  'actions': [
-    {
-      'action_name': 'convert_assembler',
-      'inputs': [
-        'src/celt/arm/arm2gnu.pl',
-        'src/celt/arm/celt_pitch_xcorr_arm.s',
-      ],
-      'outputs': [
-        '<(INTERMEDIATE_DIR)/celt_pitch_xcorr_arm_gnu.S',
-      ],
-      'action': [
-        'bash',
-        '-c',
-        'perl src/celt/arm/arm2gnu.pl src/celt/arm/celt_pitch_xcorr_arm.s | sed "s/OPUS_ARM_MAY_HAVE_[A-Z]*/1/g" | sed "/.include/d" > <(INTERMEDIATE_DIR)/celt_pitch_xcorr_arm_gnu.S',
-      ],
-      'message': 'Convert Opus assembler for ARM.'
-    },
-  ],
-}