Make callers of CommandLine use it via the base:: namespace.

chrome/browser/chromeos/login/auth/cryptohome_authenticator_unittest.cc

Index: chrome/browser/chromeos/login/auth/cryptohome_authenticator_unittest.cc
diff --git a/chrome/browser/chromeos/login/auth/cryptohome_authenticator_unittest.cc b/chrome/browser/chromeos/login/auth/cryptohome_authenticator_unittest.cc
index de0ffffc656eae3e20364aa635262b01b1a99a11..a9e721825380822e2ab3cccc0d89df80cfe81f48 100644
--- a/chrome/browser/chromeos/login/auth/cryptohome_authenticator_unittest.cc
+++ b/chrome/browser/chromeos/login/auth/cryptohome_authenticator_unittest.cc
@@ -154,7 +154,8 @@ class CryptohomeAuthenticatorTest : public testing::Test {
   virtual ~CryptohomeAuthenticatorTest() {}
 
   virtual void SetUp() {
-    CommandLine::ForCurrentProcess()->AppendSwitch(switches::kLoginManager);
+    base::CommandLine::ForCurrentProcess()->AppendSwitch(
+        switches::kLoginManager);
 
     mock_caller_ = new cryptohome::MockAsyncMethodCaller;
     cryptohome::AsyncMethodCaller::InitializeForTesting(mock_caller_);