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 0e79fc1298e1be01d350e7951b3e36667901d4cf..53330cc52575ef252556913859f5b8a1b6526098 100644
--- a/chromeos/cryptohome/system_salt_getter.cc
+++ b/chromeos/cryptohome/system_salt_getter.cc
@@ -42,6 +42,18 @@ void SystemSaltGetter::GetSystemSalt(
                  callback));
 }
 
+const SystemSaltGetter::RawSalt* SystemSaltGetter::GetRawSalt() const {
+  if (!raw_salt_.empty())

[Darren Krahn, 2016/04/13 16:33:43]

optional: candidate for a ternary operator?

 return raw_salt_.empty() ? nullptr : &raw_salt_;

[Alexander Alekseev, 2016/04/14 03:37:29]

Done.

+    return &raw_salt_;
+
+  return nullptr;
+}
+
+void SystemSaltGetter::SetRawSaltForTesting(
+    const SystemSaltGetter::RawSalt& raw_salt) {
+  raw_salt_ = raw_salt;
+}
+
 void SystemSaltGetter::DidWaitForServiceToBeAvailable(
     const GetSystemSaltCallback& callback,
     bool service_is_available) {