cryptohome: Make CryptohomeClient::Unmount non-blocking

chromeos/dbus/cryptohome_client.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chromeos/dbus/cryptohome_client.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/bind.h"
@@ skipping 69 matching lines @@
   }
 
   // CryptohomeClient override.
   void IsMounted(const BoolDBusMethodCallback& callback) override {
     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface,
                                  cryptohome::kCryptohomeIsMounted);
     CallBoolMethod(&method_call, callback);
   }
 
   // CryptohomeClient override.
-  bool Unmount(bool* success) override {
+  void Unmount(const BoolDBusMethodCallback& callback) override {
     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface,
                                  cryptohome::kCryptohomeUnmount);
-    return CallBoolMethodAndBlock(&method_call, success);
+    CallBoolMethod(&method_call, callback);
   }
 
   // CryptohomeClient override.
   void AsyncCheckKey(const cryptohome::Identification& cryptohome_id,
                      const std::string& key,
                      const AsyncMethodCallback& callback) override {
     dbus::MethodCall method_call(cryptohome::kCryptohomeInterface,
                                  cryptohome::kCryptohomeAsyncCheckKey);
     dbus::MessageWriter writer(&method_call);
     writer.AppendString(cryptohome_id.id());
@@ skipping 1170 matching lines @@
   return new CryptohomeClientImpl();
 }
 
 // static
 std::string CryptohomeClient::GetStubSanitizedUsername(
     const cryptohome::Identification& cryptohome_id) {
   return cryptohome_id.id() + kUserIdStubHashSuffix;
 }
 
 }  // namespace chromeos