cros: Show dircryto migration banner

chromeos/dbus/fake_cryptohome_client.h

Index: chromeos/dbus/fake_cryptohome_client.h
diff --git a/chromeos/dbus/fake_cryptohome_client.h b/chromeos/dbus/fake_cryptohome_client.h
index 0cf31deab36cf5e007e420e398c8053ec81a5f3f..e1b5d94f172e48496d94f0f7c8c034023fbfb69f 100644
--- a/chromeos/dbus/fake_cryptohome_client.h
+++ b/chromeos/dbus/fake_cryptohome_client.h
@@ -207,6 +207,8 @@ class CHROMEOS_EXPORT FakeCryptohomeClient : public CryptohomeClient {
   void SetFirmwareManagementParametersInTpm(
       const cryptohome::SetFirmwareManagementParametersRequest& request,
       const ProtobufMethodCallback& callback) override;
+  void NeedsDircryptoMigration(const cryptohome::Identification& cryptohome_id,
+                               const BoolDBusMethodCallback& callback) override;
 
   // Changes the behavior of WaitForServiceToBeAvailable(). This method runs
   // pending callbacks if is_available is true.
@@ -228,6 +230,11 @@ class CHROMEOS_EXPORT FakeCryptohomeClient : public CryptohomeClient {
   // format used by SystemSaltGetter::ConvertRawSaltToHexString()).
   static std::vector<uint8_t> GetStubSystemSalt();
 
+  // Sets the needs dircrypto migration value.
+  void set_needs_dircrypto_migration(bool needs_migration) {
+    needs_dircrypto_migration_ = needs_migration;
+  }
+
  private:
   void ReturnProtobufMethodCallback(
       const cryptohome::BaseReply& reply,
@@ -270,6 +277,8 @@ class CHROMEOS_EXPORT FakeCryptohomeClient : public CryptohomeClient {
   base::RepeatingTimer dircrypto_migration_progress_timer_;
   uint64_t dircrypto_migration_progress_;
 
+  bool needs_dircrypto_migration_ = false;
+
   base::WeakPtrFactory<FakeCryptohomeClient> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeCryptohomeClient);