Update to current webrtc library

This is from the upstream library commit id
3326535126e435f1ba647885ce43a8f0f3d317eb, corresponding to Chromium
88.0.4290.1.

webrtc/rtc_base/memory/BUILD.gn

@@ -0,0 +1,56 @@
+# 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_library("aligned_malloc") {
+  sources = [
+    "aligned_malloc.cc",
+    "aligned_malloc.h",
+  ]
+  deps = [ "..:checks" ]
+}
+
+# Test only utility.
+# TODO: Tag with `testonly = true` once all depending targets are correctly
+# tagged.
+rtc_library("fifo_buffer") {
+  visibility = [
+    ":unittests",
+    "..:rtc_base_tests_utils",
+    "..:rtc_base_unittests",
+    "../../p2p:rtc_p2p",  # This needs to be fixed.
+  ]
+  sources = [
+    "fifo_buffer.cc",
+    "fifo_buffer.h",
+  ]
+  deps = [
+    "..:rtc_base",
+    "../synchronization:mutex",
+    "../task_utils:pending_task_safety_flag",
+    "../task_utils:to_queued_task",
+  ]
+}
+
+rtc_library("unittests") {
+  testonly = true
+  sources = [
+    "aligned_malloc_unittest.cc",
+    "fifo_buffer_unittest.cc",
+  ]
+  deps = [
+    ":aligned_malloc",
+    ":fifo_buffer",
+    "../../test:test_support",
+  ]
+}