Restore ShellWindow app icon in RegisterApp

BUG=338972

Review URL: https://codereview.chromium.org/162813003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251173 0039d316-1c4b-4281-b951-d872f2087c98
Revert 251134 "Revert 251095 "Revert 250828 "Add a UMA stat to t..."

Reverting again. Confirmed that this is indeed the CL that broke
the Win7 x64 sync tests.

> Revert 251095 "Revert 250828 "Add a UMA stat to track if the Bro..."
> 
> Speculative re-land to see if this causes sync tests failures again.
> If it does, then we will know if this is the cause.
> 
> > Revert 250828 "Add a UMA stat to track if the Browser blacklist ..."
> > 
> > Speculative revert for failures here:
> > 
> > http://build.chromium.org/p/chromium.win/builders/Win7%20Sync%20x64/builds/11201
> > 
> > > Add a UMA stat to track if the Browser blacklist is Set on the Renderer
> > > 
> > > This shouldn't be happening, but we got some crash reports suggesting it
> > > does. Unable to repo locally so this stat will verify it does occur and
> > > then can be used to verify our fixes actually fix it.
> > > 
> > > BUG=329023
> > > 
> > > Review URL: https://codereview.chromium.org/140763008
> > 
> > TBR=csharp@chromium.org
> > 
> > Review URL: https://codereview.chromium.org/163633005
> 
> TBR=asvitkine@chromium.org
> 
> Review URL: https://codereview.chromium.org/164833002

TBR=asvitkine@chromium.org

Review URL: https://codereview.chromium.org/164913003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251174 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 251174