Revert 240298 "[gin] also install gin function templates on non-..."

Causing failures on debug win and mac. like:

#
# Fatal error in ..\..\src\api.cc, line 621
# CHECK(!isolate->IsInitialized()) failed
#

> [gin] also install gin function templates on non-gin managed isolates
> 
> BUG=321631
> R=dcarney@chromium.org
> 
> Review URL: https://codereview.chromium.org/110443005

TBR=jochen@chromium.org

Review URL: https://codereview.chromium.org/98863004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@240331 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 240331