Hook up CryptAuthGCMManager to the enrollment and device sync managers.

components/proximity_auth/cryptauth/fake_cryptauth_gcm_manager.cc

+// Copyright 2015 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 "components/proximity_auth/cryptauth/fake_cryptauth_gcm_manager.h"
+
+namespace proximity_auth {
+
+FakeCryptAuthGCMManager::FakeCryptAuthGCMManager(
+    const std::string& registration_id)
+    : registration_in_progress_(false), registration_id_(registration_id) {}
+
+FakeCryptAuthGCMManager::~FakeCryptAuthGCMManager() {}
+
+void FakeCryptAuthGCMManager::StartListening() {}
+
+void FakeCryptAuthGCMManager::RegisterWithGCM() {
+  registration_in_progress_ = true;
+}
+
+std::string FakeCryptAuthGCMManager::GetRegistrationId() {
+  return registration_id_;
+}
+
+void FakeCryptAuthGCMManager::AddObserver(Observer* observer) {
+  observers_.AddObserver(observer);
+}
+
+void FakeCryptAuthGCMManager::RemoveObserver(Observer* observer) {
+  observers_.RemoveObserver(observer);
+}
+
+void FakeCryptAuthGCMManager::CompleteRegistration(
+    const std::string& registration_id) {
+  CHECK(registration_in_progress_);

[sacomoto, 2015/07/27 16:56:51]

nit: Why CHECK and not DCHECK? Unit tests are always run in debug mode, right?

[Tim Song, 2015/07/28 16:45:19]

Done.

+  registration_in_progress_ = false;
+  registration_id_ = registration_id;
+  bool success = !registration_id_.empty();
+  FOR_EACH_OBSERVER(Observer, observers_, OnGCMRegistrationResult(success));
+}
+
+void FakeCryptAuthGCMManager::PushReenrollMessage() {
+  FOR_EACH_OBSERVER(Observer, observers_, OnReenrollMessage());
+}
+
+void FakeCryptAuthGCMManager::PushResyncMessage() {
+  FOR_EACH_OBSERVER(Observer, observers_, OnResyncMessage());
+}
+
+}  // namespace proximity_auth