diff -up chromium-89.0.4389.72/third_party/webrtc/audio/utility/channel_mixer.cc.missing-cstring chromium-89.0.4389.72/third_party/webrtc/audio/utility/channel_mixer.cc

--- chromium-89.0.4389.72/third_party/webrtc/audio/utility/channel_mixer.cc.missing-cstring 2021-03-02 12:48:16.000000000 -0500

+++ chromium-89.0.4389.72/third_party/webrtc/audio/utility/channel_mixer.cc 2021-03-04 13:31:42.894817353 -0500

@@ -8,6 +8,8 @@

  *  be found in the AUTHORS file in the root of the source tree.

  */

+#include <cstring>

+

 #include "audio/utility/channel_mixer.h"

 #include "audio/utility/channel_mixing_matrix.h"

diff -up chromium-89.0.4389.72/third_party/webrtc/modules/desktop_capture/linux/base_capturer_pipewire.cc.missing-cstring chromium-89.0.4389.72/third_party/webrtc/modules/desktop_capture/linux/base_capturer_pipewire.cc

--- chromium-89.0.4389.72/third_party/webrtc/modules/desktop_capture/linux/base_capturer_pipewire.cc.missing-cstring    2021-03-04 13:31:42.895817359 -0500

+++ chromium-89.0.4389.72/third_party/webrtc/modules/desktop_capture/linux/base_capturer_pipewire.cc    2021-03-04 13:45:27.795162431 -0500

@@ -23,6 +23,7 @@

 #include <sys/mman.h>

 #include <sys/syscall.h>

+#include <cstring>

 #include <memory>

 #include <utility>

diff -up chromium-89.0.4389.72/third_party/webrtc/modules/video_coding/utility/ivf_file_reader.cc.missing-cstring chromium-89.0.4389.72/third_party/webrtc/modules/video_coding/utility/ivf_file_reader.cc

--- chromium-89.0.4389.72/third_party/webrtc/modules/video_coding/utility/ivf_file_reader.cc.missing-cstring    2021-03-02 12:48:17.000000000 -0500

+++ chromium-89.0.4389.72/third_party/webrtc/modules/video_coding/utility/ivf_file_reader.cc    2021-03-04 13:31:42.895817359 -0500

@@ -10,6 +10,7 @@

 #include "modules/video_coding/utility/ivf_file_reader.h"

+#include <cstring>

 #include <string>

 #include <vector>

​