Move Cryptohome mount error code to system_api

BUG=chromium-os:16552
TEST=gmerge libcros

Change-Id: I14f756b802d37ba7c2cbccb2be3ad5ac9c2e5539
Reviewed-on: https://gerrit.chromium.org/gerrit/15481
Reviewed-by: Satoru Takabayashi <satorux@chromium.org>
Commit-Ready: Ryo Hashimoto <hashimoto@chromium.org>
Tested-by: Ryo Hashimoto <hashimoto@chromium.org>
diff --git a/chromeos_cryptohome.h b/chromeos_cryptohome.h
index 43a801e..ba8fefb 100644
--- a/chromeos_cryptohome.h
+++ b/chromeos_cryptohome.h
@@ -20,17 +20,6 @@
   int return_code;
 };
 
-// These constants must match the MountError enumeration in mount.h from
-// cryptohome.
-const int kCryptohomeMountErrorNone = 0;
-const int kCryptohomeMountErrorFatal = 1 << 0;
-const int kCryptohomeMountErrorKeyFailure = 1 << 1;
-const int kCryptohomeMountErrorMountPointBusy = 1 << 2;
-const int kCryptohomeMountErrorTpmCommError = 1 << 3;
-const int kCryptohomeMountErrorTpmDefendLock = 1 << 4;
-const int kCryptohomeMountErrorUserDoesNotExist = 1 << 5;
-const int kCryptohomeMountErrorRecreated = 1 << 31;
-
 extern int (*CryptohomeAsyncCheckKey)(const char* user_email,
                                       const char* key);
 extern int (*CryptohomeAsyncMigrateKey)(const char* user_email,