(See crbug.com/549699 and  crbug.com/609385  for context)

a. stop the aosp/master -> cros/master mirroring requested in the referenced bug and leave cros/master with whatever it has today (we will take care of the ToT in cros manually from now on).

aosp/platform/external/dbus-binding-generator
aosp/platform/external/libchrome
aosp/platform/external/libchromeos
aosp/platform/external/minijail
aosp/platform/external/modp_b64
aosp/platform/hardware/libhardware
aosp/platform/system/attestation
aosp/platform/system/bt
aosp/platform/system/connectivity/apmanager
aosp/platform/system/connectivity/shill
aosp/platform/system/core
aosp/platform/system/firewalld
aosp/platform/system/tpm_manager
aosp/platform/system/trunks
aosp/platform/system/update_engine
aosp/platform/system/webservd

2.b. Change ACLs to allow developers to upload CLs to cros/master for review, as any other normal chromium repository on all those.