Implementation of new AecDump interface.

webrtc/modules/audio_processing/aec_dump/BUILD.gn

+import("../../../webrtc.gni")  # This contains def of 'rtc_enable_protobuf'
+
+rtc_source_set("aec_dump") {
+  sources = [
+    "aec_dump_factory.h",
+  ]
+
+  public_deps = [
+    "..:aec_dump_interface",
+  ]
+
+  deps = [
+    "../../../base:rtc_base_approved",
+  ]
+}
+
+if (rtc_enable_protobuf) {
+  rtc_source_set("aec_dump_impl") {
+    sources = [
+      "aec_dump_impl.cc",
+      "aec_dump_impl.h",
+      "capture_stream_info_impl.cc",
+      "capture_stream_info_impl.h",
+      "write_to_file_task.cc",
+      "write_to_file_task.h",
+    ]
+
+    public = []
+
+    public_deps = [
+      ":aec_dump",
+      "..:aec_dump_interface",
+    ]
+
+    deps = [
+      "../../../base:protobuf_utils",
+      "../../../base:rtc_base_approved",
+      "../../../base:rtc_task_queue",
+      "../../../modules:module_api",
+      "../../../system_wrappers",
+    ]
+
+    deps += [ "../:audioproc_debug_proto" ]
+  }
+
+  rtc_source_set("aec_dump_unittests") {
+    testonly = true
+    defines = []
+    deps = [
+      ":aec_dump_impl",
+      "..:aec_dump_interface",
+      "..:audioproc_debug_proto",
+      "../../../base:rtc_task_queue",
+      "../../../modules:module_api",
+      "../../../test:test_support",
+      "//testing/gtest",
+    ]
+    sources = [
+      "aec_dump_unittest.cc",
+    ]
+  }
+}
+
+rtc_source_set("null_aec_dump_factory") {
+  assert_no_deps = [ ":aec_dump_impl" ]
+  sources = [
+    "null_aec_dump_factory.cc",
+  ]
+
+  public_deps = [
+    ":aec_dump",
+    "..:aec_dump_interface",
+  ]
+}