[Easy signin] Wire up userClick auth attempt to easy unlock app and back

chrome/browser/signin/easy_unlock_service_signin_chromeos.cc

 // Copyright 2014 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 "chrome/browser/signin/easy_unlock_service_signin_chromeos.h"
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/logging.h"
@@ skipping 143 matching lines @@
 
 std::string EasyUnlockServiceSignin::GetChallenge() const {
   const UserData* data = FindLoadedDataForCurrentUser();
   // TODO(xiyuan): Use correct remote device instead of hard coded first one.
   uint32 device_index = 0;
   if (!data || data->devices.size() <= device_index)
     return std::string();
   return data->devices[device_index].challenge;
 }
 
+std::string EasyUnlockServiceSignin::GetWrappedSecret() const {
+  const UserData* data = FindLoadedDataForCurrentUser();
+  // TODO(xiyuan): Use correct remote device instead of hard coded first one.
+  uint32 device_index = 0;
+  if (!data || data->devices.size() <= device_index)
+    return std::string();
+  return data->devices[device_index].wrapped_secret;
+}
+
 void EasyUnlockServiceSignin::InitializeInternal() {
   if (chromeos::LoginState::Get()->IsUserLoggedIn())
     return;
 
   service_active_ = true;
 
   chromeos::LoginState::Get()->AddObserver(this);
   ScreenlockBridge* screenlock_bridge = ScreenlockBridge::Get();
   screenlock_bridge->AddObserver(this);
   if (!screenlock_bridge->focused_user_id().empty())
@@ skipping 27 matching lines @@
 void EasyUnlockServiceSignin::OnFocusedUserChanged(const std::string& user_id) {
   if (user_id_ == user_id)
     return;
 
   // Setting or clearing the user_id may changed |IsAllowed| value, so in these
   // cases update the app state. Otherwise, it's enough to notify the app the
   // user data has been updated.
   bool should_update_app_state = user_id_.empty() != user_id.empty();
   user_id_ = user_id;
 
-  ResetScreenlockStateHandler();
+  ResetScreenlockState();
 
   if (should_update_app_state) {
     UpdateAppState();
   } else {
     NotifyUserUpdated();
   }
 
   LoadCurrentUserDataIfNeeded();
 }
 
@@ skipping 52 matching lines @@
     return NULL;
 
   std::map<std::string, UserData*>::const_iterator it =
       user_data_.find(user_id_);
   if (it == user_data_.end())
     return NULL;
   if (it->second->state != USER_DATA_STATE_LOADED)
     return NULL;
   return it->second;
 }