[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

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@253994 0039d316-1c4b-4281-b951-d872f2087c98
5 files changed