Reset avatar image when the avatar policy becomes unset

chrome/browser/chromeos/login/users/avatar/user_image_manager_impl.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/chromeos/login/users/avatar/user_image_manager_impl.h"
 
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
@@ skipping 678 matching lines @@
   const User* user = GetUser();
   // If the user image for the currently logged-in user became managed, stop the
   // sync observer so that the policy-set image does not get synced out.
   if (user && user->is_logged_in())
     user_image_sync_observer_.reset();
 }
 
 void UserImageManagerImpl::OnExternalDataCleared(const std::string& policy) {
   DCHECK_EQ(policy::key::kUserAvatarImage, policy);
   has_managed_image_ = false;
+  SetInitialUserImage();
   TryToCreateImageSyncObserver();
 }
 
 void UserImageManagerImpl::OnExternalDataFetched(const std::string& policy,
                                                  scoped_ptr<std::string> data) {
   DCHECK_EQ(policy::key::kUserAvatarImage, policy);
   DCHECK(IsUserImageManaged());
   if (data) {
     job_.reset(new Job(this));
     job_->SetToImageData(data.Pass());
@@ skipping 285 matching lines @@
 }
 
 bool UserImageManagerImpl::IsUserLoggedInAndRegular() const {
   const User* user = GetUser();
   if (!user)
     return false;
   return user->is_logged_in() && user->GetType() == User::USER_TYPE_REGULAR;
 }
 
 }  // namespace chromeos