Error while building:
../../chrome/browser/media/cdm_storage_id_key.cc:10:10: fatal error: 'chrome/browser/internal/google_chrome_cdm_storage_id_key.h' file not found
#include "chrome/browser/internal/google_chrome_cdm_storage_id_key.h"
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.

I believe the responsible CL is:
https://chromium-review.googlesource.com/c/chromium/src/+/729266

I could not find the CL with this file.

I'm building "Simple Chrome" for ChromeOS with the official build:
https://chromium.googlesource.com/chromiumos/docs/+/master/simple_chrome_workflow.md

Am I doing something wrong?