Revert 253994 "[Mac] Remove NSApplication from the renderer."

Speculative revert to see if this is causing Mac10.6 layout test bots to crash.

> [Mac] Remove NSApplication from the renderer.
> 
> This removes the +sharedApplication warmup from the renderer, along with the
> trackpad IME hack. The hack is no longer necessary because NSApplication will no
> longer connect to TSM.
> 
> BUG=306348,311899,336642,31225,152566
> 
> Review URL: https://codereview.chromium.org/177243021

TBR=rsesek@chromium.org

Review URL: https://codereview.chromium.org/183743006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@254034 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 254034