Make some of the pnacl_irt_shim data members local.

The structs are internal to the pnacl_shim.c.

BUG=none
R=teravest@chromium.org

Review URL: https://codereview.chromium.org/126343002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243452 0039d316-1c4b-4281-b951-d872f2087c98
In Chromium, App Launcher's WM_CLASS is "chromium_app_list".

It was previously "chrome_app_list" regardless of which build we are in.

BUG=331729

Review URL: https://codereview.chromium.org/120723006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243453 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 243452
SVN changes up to revision 243453