EN, mf, DO YOU SPEAK IT?

No more symbolic links in the .app.  Except for the ones that codesign adds.

The en_US.lproj directory should not exist, there should be only en.lproj.
Formerly, there was a symbolic link from en.lproj to en_US.lproj.

BUG=25578, 19165
TEST= - find C.app -name en_US.lproj should return nothing.
      - find C.app -name en.lproj should show en.lproj in C.app,
        C F.framework, and C H.app.
      - find C.app -type l should return nothing, however, on a signed build,
        it will still show symbolic links for CodeResources.
      - Say "What" again.  Say "What" again.  I dare you.  I double-dare you.
      - With English or U.S. English as the top or only choices in the
        International (10.5) or Language & Text (10.6) system preference
        pane's Language tab, the localized language should be English.
      - In this configuration, the Accept-Language header field should be
        "en-US,en;q=0.8".  See http://whatsmyuseragent.com/ and look for
        HTTP_ACCEPT_LANGUAGE.
Review URL: http://codereview.chromium.org/345057

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@30955 0039d316-1c4b-4281-b951-d872f2087c98