Don't offer to translate the devtools.

BUG=63265
TEST=as in bug

Review URL: http://codereview.chromium.org/6011001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@69556 0039d316-1c4b-4281-b951-d872f2087c98
TranslateManager* TranslateManager::GetInstance() {
  return Singleton<TranslateManager>::get();
}

TranslateManager* TranslateManager::GetInstance() {
  return Singleton<TranslateManager>::get();
}
