Bump to WebRTC M120 release

Some API deprecation -- ExperimentalAgc and ExperimentalNs are gone.
We're continuing to carry iSAC even though it's gone upstream, but maybe
we'll want to drop that soon.

webrtc/rtc_base/system/BUILD.gn

@@ -0,0 +1,111 @@
+# Copyright (c) 2018 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("../../webrtc.gni")
+if (is_android) {
+  import("//build/config/android/config.gni")
+  import("//build/config/android/rules.gni")
+}
+
+rtc_source_set("arch") {
+  sources = [ "arch.h" ]
+}
+
+rtc_source_set("asm_defines") {
+  sources = [ "asm_defines.h" ]
+}
+
+rtc_library("file_wrapper") {
+  sources = [
+    "file_wrapper.cc",
+    "file_wrapper.h",
+  ]
+  deps = [
+    "..:checks",
+    "..:criticalsection",
+    "..:safe_conversions",
+  ]
+  absl_deps = [ "//third_party/abseil-cpp/absl/strings" ]
+}
+
+if (rtc_include_tests) {
+  rtc_library("file_wrapper_unittests") {
+    testonly = true
+    sources = [ "file_wrapper_unittest.cc" ]
+    deps = [
+      ":file_wrapper",
+      "//rtc_base:checks",
+      "//test:fileutils",
+      "//test:test_support",
+    ]
+  }
+}
+
+rtc_source_set("ignore_warnings") {
+  sources = [ "ignore_warnings.h" ]
+}
+
+rtc_source_set("inline") {
+  sources = [ "inline.h" ]
+}
+
+rtc_source_set("unused") {
+  sources = [ "unused.h" ]
+}
+
+rtc_source_set("assume") {
+  sources = [ "assume.h" ]
+}
+
+rtc_source_set("rtc_export") {
+  sources = [
+    "rtc_export.h",
+    "rtc_export_template.h",
+  ]
+}
+
+rtc_source_set("no_unique_address") {
+  sources = [ "no_unique_address.h" ]
+}
+
+rtc_source_set("no_cfi_icall") {
+  sources = [ "no_cfi_icall.h" ]
+
+  deps = [ "..:sanitizer" ]
+}
+
+if (is_mac || is_ios) {
+  rtc_library("cocoa_threading") {
+    sources = [
+      "cocoa_threading.h",
+      "cocoa_threading.mm",
+    ]
+    deps = [ "..:checks" ]
+    frameworks = [ "Foundation.framework" ]
+  }
+
+  rtc_library("gcd_helpers") {
+    sources = [
+      "gcd_helpers.h",
+      "gcd_helpers.m",
+    ]
+    include_dirs = [ "../.." ]
+  }
+}
+
+rtc_source_set("warn_current_thread_is_deadlocked") {
+  sources = [ "warn_current_thread_is_deadlocked.h" ]
+  deps = []
+  if (is_android && !build_with_chromium) {
+    sources += [ "warn_current_thread_is_deadlocked.cc" ]
+    deps += [
+      "..:logging",
+      "../../sdk/android:native_api_stacktrace",
+    ]
+  }
+}