[App Shell] Remove chrome_100_percent.pak dependancy.

Now app::ShellMainDelegate initializes with chrome_100_percent.pak
by default. This patch is to remove this dependancy by add all
chrome-specific resources to app_shell.pak.

BUG=348484

Review URL: https://codereview.chromium.org/176873016

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255830 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 255830