These Daydream-specific resources are going to be included in non-Android platforms when we enable VR devices on Windows.

Summarizing the current state:

//src/chrome/browser/vr/vr_controller_model.cc is included by //src/chrome/browser/vr/BUILD.gn, which applies to all builds with enable_vr=true.

vr_controller_model.cc uses several IDR_VR_SHELL_DDCONTROLLER_* resources. In addition, //src/chrome/browser/resources/vr_shell_resources.grd and its build files do not have platform checks.

We may want/need to add a build flag for VR browser so we don't need this code and associated resources on platforms that don't currently support it.

On a somewhat related note, IDS_PAGE_INFO_VR_BROWSER_UNSUPPORTED_MODE is being included in all builds. It should probably only be included `<if expr="enable_vr">`. Fixing this doesn't require any refactoring.

We'll want this soonish to avoid install size bloat in M63.

M64?

The goal of this bug has shifted over time. I've logged crbug.com/779108 to capture the original intent. I feel that creating neutral controllers is the correct long term direction, but this is a reasonable tactical solution in the short term.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/fd1e89557fa78a467061f732a8473fd863a89b1a

commit fd1e89557fa78a467061f732a8473fd863a89b1a
Author: Bill Orr <billorr@chromium.org>
Date: Thu Nov 09 01:41:49 2017

Don't include Daydream controller models on all VR-enabled platforms

This change moves daydream-specific assets to a vr_daydream_resources.grd,
which is processed on all enable_vr builds, but only included in Chrome on
enable_gvr_services builds.  Test code can still depend on these assets
even if running on desktop.

BUG= 743687 

Change-Id: Ie2516ae2534858044c00f281eb2f71d0cccd8aef
Reviewed-on: https://chromium-review.googlesource.com/752035
Commit-Queue: Bill Orr <billorr@chromium.org>
Reviewed-by: Ian Vollick <vollick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#515052}
[modify] https://crrev.com/fd1e89557fa78a467061f732a8473fd863a89b1a/chrome/browser/vr/BUILD.gn
[modify] https://crrev.com/fd1e89557fa78a467061f732a8473fd863a89b1a/chrome/chrome_paks.gni