Updating trunk VERSION from 1862.0 to 1863.0

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@253707 0039d316-1c4b-4281-b951-d872f2087c98
Cleanup of windows launch code

This is a redo of
https://codereview.chromium.org/142473002/

The windows startup code was handling aura and non-aura cases which
require different startup logic in metro (immersive mode). Since we
don't support the non-Aura logic we can get rid of a lot of code.

Tbring gab for the installer constant addition.

TBR=gab
BUG=none

Review URL: https://codereview.chromium.org/158403002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@253709 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 253707
SVN changes up to revision 253709