GitLab

Rename CompositorDelegate to GraphicsDelegate and VrShellGl to
GvrGraphicsDelegate.

Bug: 875291
Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:linux_vr;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel
Change-Id: Iecb896daaa47fc3681ca642e4dac4a654536d1c5
Reviewed-on: https://chromium-review.googlesource.com/1208675
Commit-Queue: Aldo Culquicondor <acondor@chromium.org>
Reviewed-by: Michael Thiessen <mthiesse@chromium.org>
Cr-Commit-Position: refs/heads/master@{#589633}