Revert of Windows install_static refactor. (patchset #15 id:320001 of https://codereview.chromium.org/2422643002/ )

Reason for revert:
Causes a crash at uninstall; see https://crbug.com/663703.

Original issue's description:
> Windows install_static refactor.
>
> This change introduces install_static::InstallDetails, a module-global
> holder of details relating to the current install. It also more clearly
> defines the concept of a primary install mode and one or more secondary
> install modes (e.g., "Chrome SxS" for Google Chrome's canary channel).
> Furthermore, it creates a clear boundary for brand-specific constants so
> that Chromium and Google Chrome don't bleed into one another. See
> chrome/install_static/README.md for more information.
>
> BUG=373987
> CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.win:win10_chromium_x64_rel_ng
>
> Committed: https://crrev.com/92bc27b8b101d2b300a7b3afd79265b3cfba1152
> Cr-Commit-Position: refs/heads/master@{#430728}

TBR=ananta@chromium.org,robertshield@chromium.org,siggi@chromium.org,pennymac@chromium.org,thakis@chromium.org,bradnelson@chromium.org,phajdan.jr@chromium.org,dschuff@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=373987

Review-Url: https://codereview.chromium.org/2491463002
Cr-Commit-Position: refs/heads/master@{#430914}