[cros mp] Load profiles from /home/chronos/u-[$hash], add GetUserIdHashFromProfile()

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 "base/bind.h"
 #include "base/message_loop.h"
 #include "chromeos/cryptohome/async_method_caller.h"
 #include "chromeos/dbus/blocking_method_caller.h"
 #include "dbus/bus.h"
 #include "dbus/message.h"
 #include "dbus/object_path.h"
 #include "dbus/object_proxy.h"
 #include "third_party/cros_system_api/dbus/service_constants.h"
 
 namespace chromeos {
 
 namespace {
 
+// This suffix is appended to user_id to get hash in stub implementation:
+// stub_hash = "[user_id]-hash";
+static const char kUserIdStubHashSuffix[] = "-hash";
+
 // The CryptohomeClient implementation.
 class CryptohomeClientImpl : public CryptohomeClient {
  public:
   explicit CryptohomeClientImpl(dbus::Bus* bus)
       : proxy_(bus->GetObjectProxy(
             cryptohome::kCryptohomeServiceName,
             dbus::ObjectPath(cryptohome::kCryptohomeServicePath))),
         blocking_method_caller_(bus, proxy_),
         weak_ptr_factory_(this) {
     proxy_->ConnectToSignal(
@@ skipping 816 matching lines @@
                  kStubSystemSalt + arraysize(kStubSystemSalt) - 1);
     return true;
   }
 
   // CryptohomeClient override.
   virtual void GetSanitizedUsername(
       const std::string& username,
       const StringDBusMethodCallback& callback) OVERRIDE {
     // Even for stub implementation we have to return different values
     // so that multi-profiles would work.
-    std::string sanitized_username = username + "-profile";
+    std::string sanitized_username = username + kUserIdStubHashSuffix;
     MessageLoop::current()->PostTask(
         FROM_HERE,
         base::Bind(callback, DBUS_METHOD_CALL_SUCCESS, sanitized_username));
   }
 
   // CryptohomeClient override.
   virtual void AsyncMount(const std::string& username,
                           const std::string& key,
                           int flags,
                           const AsyncMethodCallback& callback) OVERRIDE {
@@ skipping 320 matching lines @@
 // static
 CryptohomeClient* CryptohomeClient::Create(DBusClientImplementationType type,
                                            dbus::Bus* bus) {
   if (type == REAL_DBUS_CLIENT_IMPLEMENTATION)
     return new CryptohomeClientImpl(bus);
   DCHECK_EQ(STUB_DBUS_CLIENT_IMPLEMENTATION, type);
   return new CryptohomeClientStubImpl();
 }
 
 }  // namespace chromeos