cryptohome: Move stateless wrapper functions out of CryptohomeLibrary

chrome/browser/chromeos/login/login_browsertest.cc

Index: chrome/browser/chromeos/login/login_browsertest.cc
diff --git a/chrome/browser/chromeos/login/login_browsertest.cc b/chrome/browser/chromeos/login/login_browsertest.cc
index 4db9cb044e6b6c1ddb13089e94dd84c913099c9a..d82929e76976b3692074ca0c68e75395bde05d5d 100644
--- a/chrome/browser/chromeos/login/login_browsertest.cc
+++ b/chrome/browser/chromeos/login/login_browsertest.cc
@@ -44,8 +44,6 @@ class LoginTestBase : public InProcessBrowserTest {
     mock_cryptohome_library_.reset(new chromeos::MockCryptohomeLibrary());
     EXPECT_CALL(*(mock_cryptohome_library_.get()), GetSystemSalt())
         .WillRepeatedly(Return(std::string("stub_system_salt")));
-    EXPECT_CALL(*(mock_cryptohome_library_.get()), InstallAttributesIsReady())
-        .WillRepeatedly(Return(false));
   }
 
   scoped_ptr<chromeos::MockCryptohomeLibrary> mock_cryptohome_library_;