The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/d4b2912b759a8d3b86d8ee4db273818d92d92847

commit d4b2912b759a8d3b86d8ee4db273818d92d92847
Author: John Rummell <jrummell@chromium.org>
Date: Mon Jul 10 21:38:34 2017

Change External Clear Key CDM to use CDM_9 interface

Since support for the CDM_9 interface is behind a flag, provide the
flag when testing.

BUG= 740265 
TEST=ExternalClearKey browser_tests pass

Change-Id: I9d4975430909d6887942cbb14803b845488566a1
Reviewed-on: https://chromium-review.googlesource.com/564182
Commit-Queue: John Rummell <jrummell@chromium.org>
Reviewed-by: Xiaohan Wang <xhwang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#485405}
[modify] https://crrev.com/d4b2912b759a8d3b86d8ee4db273818d92d92847/chrome/browser/media/encrypted_media_browsertest.cc
[modify] https://crrev.com/d4b2912b759a8d3b86d8ee4db273818d92d92847/media/cdm/aes_decryptor_unittest.cc
[modify] https://crrev.com/d4b2912b759a8d3b86d8ee4db273818d92d92847/media/cdm/cdm_adapter_unittest.cc
[modify] https://crrev.com/d4b2912b759a8d3b86d8ee4db273818d92d92847/media/cdm/cdm_file_adapter.cc
[modify] https://crrev.com/d4b2912b759a8d3b86d8ee4db273818d92d92847/media/cdm/cdm_file_adapter.h
[modify] https://crrev.com/d4b2912b759a8d3b86d8ee4db273818d92d92847/media/cdm/ppapi/external_clear_key/clear_key_cdm.cc
[modify] https://crrev.com/d4b2912b759a8d3b86d8ee4db273818d92d92847/media/cdm/ppapi/external_clear_key/clear_key_cdm.h
[modify] https://crrev.com/d4b2912b759a8d3b86d8ee4db273818d92d92847/media/cdm/ppapi/external_clear_key/clear_key_cdm_common.h