The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/e14e1b9a356b279f1fc6b407fdfc69235a479c2a

commit e14e1b9a356b279f1fc6b407fdfc69235a479c2a
Author: Hirokazu Honda <hiroh@chromium.org>
Date: Mon Apr 09 03:36:23 2018

GpuArcVideoDecodeAccelerator: Remove deprecated codes

AllocateProtectedBuffersDeprecated() and ImportBufferForPicturesDeprecated()
will never be used. This removes these functions and non used member variables.

BUG= chromium:816327 
TEST=Play Secure video using EXO Player
TEST=CtsMediaTestCases
TEST=GtsMediaTestCases

Change-Id: I95b7482913dc02f91ed778aa80acfbce7c20a7f9
Reviewed-on: https://chromium-review.googlesource.com/989373
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Kuang-che Wu <kcwu@chromium.org>
Commit-Queue: Hirokazu Honda <hiroh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#549100}
[modify] https://crrev.com/e14e1b9a356b279f1fc6b407fdfc69235a479c2a/components/arc/common/video_decode_accelerator.mojom
[modify] https://crrev.com/e14e1b9a356b279f1fc6b407fdfc69235a479c2a/components/arc/video_accelerator/gpu_arc_video_decode_accelerator.cc
[modify] https://crrev.com/e14e1b9a356b279f1fc6b407fdfc69235a479c2a/components/arc/video_accelerator/gpu_arc_video_decode_accelerator.h