Revert of Remove WallpaperManager dependency on Cryptohome.

chromeos/cryptohome/system_salt_getter.cc

Index: chromeos/cryptohome/system_salt_getter.cc
diff --git a/chromeos/cryptohome/system_salt_getter.cc b/chromeos/cryptohome/system_salt_getter.cc
index 5109f107c6e13c278a99412e18bcfb954b7cb1bf..0e79fc1298e1be01d350e7951b3e36667901d4cf 100644
--- a/chromeos/cryptohome/system_salt_getter.cc
+++ b/chromeos/cryptohome/system_salt_getter.cc
@@ -40,15 +40,6 @@
       base::Bind(&SystemSaltGetter::DidWaitForServiceToBeAvailable,
                  weak_ptr_factory_.GetWeakPtr(),
                  callback));
-}
-
-const SystemSaltGetter::RawSalt* SystemSaltGetter::GetRawSalt() const {
-  return raw_salt_.empty() ? nullptr : &raw_salt_;
-}
-
-void SystemSaltGetter::SetRawSaltForTesting(
-    const SystemSaltGetter::RawSalt& raw_salt) {
-  raw_salt_ = raw_salt;
 }
 
 void SystemSaltGetter::DidWaitForServiceToBeAvailable(