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Implement GPUArcVDA working with new VDA-like IPC. GpuArcVDA currently
translates mojo IPC to VDA API, and therefore ChromeArcVDA is deleted.
ChromeArcVDA and GpuArcVDA based on old IPC still exist as deprecated classes
for compatibility, so that the old IPC can be used.

TEST=CTS MediaTest on veyron_minnie and eve
TEST=CTS MediaTest with --mus=viz on veyron_minnie and eve
TEST=Secure Playback test using ExoPlayer
BUG=chromium:745457
CQ-DEPEND=CL:609564

Cq-Include-Trybots: master.tryserver.chromium.android:android_optional_gpu_tests_rel
Change-Id: I9d90a6945c81e20572616c04c1d4f496e2bb3f87
Reviewed-on: https://chromium-review.googlesource.com/648538
Commit-Queue: Hirokazu Honda <hiroh@chromium.org>
Reviewed-by: Luis Hector Chavez <lhchavez@chromium.org>
Reviewed-by: Pawel Osciak <posciak@chromium.org>
Reviewed-by: Steven Holte <holte@chromium.org>
Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#523311}