Move optional.h to webrtc/api/

webrtc/modules/audio_processing/BUILD.gn

 # Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 import("//build/config/arm.gni")
 import("//third_party/protobuf/proto_library.gni")
@@ skipping 220 matching lines @@
     "voice_detection_impl.cc",
     "voice_detection_impl.h",
   ]
 
   defines = []
   deps = [
     ":aec_dump_interface",
     "..:module_api",
     "../..:webrtc_common",
     "../../api:array_view",
+    "../../api:optional",
     "../../audio/utility:audio_frame_operations",
     "../../rtc_base:gtest_prod",
     "../../rtc_base:protobuf_utils",
     "../audio_coding:isac",
   ]
   public_deps = [
     ":audio_processing_c",
   ]
 
   if (apm_debug_dump) {
@@ skipping 295 matching lines @@
       "vad/vad_circular_buffer_unittest.cc",
       "vad/voice_activity_detector_unittest.cc",
     ]
 
     deps = [
       ":audio_processing",
       ":audioproc_test_utils",
       "..:module_api",
       "../..:webrtc_common",
       "../../api:array_view",
+      "../../api:optional",
       "../../common_audio:common_audio",
       "../../rtc_base:gtest_prod",
       "../../rtc_base:protobuf_utils",
       "../../rtc_base:rtc_base",
       "../../rtc_base:rtc_base_approved",
       "../../system_wrappers:system_wrappers",
       "../../test:test_support",
       "../audio_coding:neteq_tools",
       "aec_dump:mock_aec_dump_unittests",
       "test/conversational_speech:unittest",
@@ skipping 174 matching lines @@
         "test/audioproc_float.cc",
         "test/wav_based_simulator.cc",
         "test/wav_based_simulator.h",
       ]
 
       deps = [
         ":audio_processing",
         ":audioproc_debug_proto",
         ":audioproc_protobuf_utils",
         ":audioproc_test_utils",
+        "../../api:optional",
         "../../common_audio:common_audio",
         "../../rtc_base:protobuf_utils",
         "../../rtc_base:rtc_base_approved",
         "../../rtc_base:rtc_task_queue",
         "../../system_wrappers",
         "../../system_wrappers:system_wrappers_default",
         "../../test:test_support",
         "aec_dump",
         "aec_dump:aec_dump_impl",
         "//testing/gtest",
@@ skipping 11 matching lines @@
       "test/simulator_buffers.cc",
       "test/simulator_buffers.h",
       "test/test_utils.cc",
       "test/test_utils.h",
     ]
 
     deps = [
       ":audio_processing",
       "..:module_api",
       "../../api:array_view",
+      "../../api:optional",
       "../../common_audio",
       "../../rtc_base:rtc_base_approved",
       "../../system_wrappers:system_wrappers",
     ]
   }
 
   rtc_executable("transient_suppression_test") {
     testonly = true
     sources = [
       "transient/file_utils.cc",
@@ skipping 75 matching lines @@
 
       deps = [
         ":audioproc_debug_proto",
         "../..:webrtc_common",
         "../../rtc_base:protobuf_utils",
         "../../rtc_base:rtc_base_approved",
       ]
     }
   }
 }