Display: set color_depth and depth_per_component value based on kEnableHDROutput

This is also update the aura code creating the ScreenInfo to use the
value reported by display::Display instead of hardcoding it as
display::Display was doing the same thing. It is more consistent too as
the Mac implementation was already doing this.

This is also moving the kEnableHDROutput from ui/base/ to ui/display/
because ui/display/ can't depend on ui/base/ and it only moves the
dependency of ui/compositor/ from ui/base/ to ui/display/.

In the future, we should set the values on display::Display instead of
hardcoding too values.

Intent to Ship:
https://groups.google.com/a/chromium.org/d/msg/blink-dev/c-b866DUg10/MxS1WTWfBgAJ

BUG=701466
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel

Review-Url: https://codereview.chromium.org/2742383006
Cr-Commit-Position: refs/heads/master@{#459288}
24 files changed