Upstream Chrome on iOS source code [6/11].

ios/chrome/browser/ui/ntp/recent_tabs/synced_sessions_bridge.mm

+// 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.
+
+#import "ios/chrome/browser/ui/ntp/recent_tabs/synced_sessions_bridge.h"
+
+#include "components/browser_sync/profile_sync_service.h"
+#include "components/signin/core/browser/signin_manager.h"
+#include "components/sync/driver/sync_service.h"
+#include "ios/chrome/browser/browser_state/chrome_browser_state.h"
+#include "ios/chrome/browser/signin/signin_manager_factory.h"
+#include "ios/chrome/browser/sync/ios_chrome_profile_sync_service_factory.h"
+#import "ios/chrome/browser/ui/ntp/recent_tabs/recent_tabs_table_view_controller.h"
+
+namespace synced_sessions {
+
+#pragma mark - SyncedSessionsObserverBridge
+
+SyncedSessionsObserverBridge::SyncedSessionsObserverBridge(
+    id<SyncedSessionsObserver> owner,
+    ios::ChromeBrowserState* browserState)
+    : SyncObserverBridge(
+          owner,
+          IOSChromeProfileSyncServiceFactory::GetForBrowserState(browserState)),
+      owner_(owner),
+      signin_manager_(
+          ios::SigninManagerFactory::GetForBrowserState(browserState)),
+      sync_service_(
+          IOSChromeProfileSyncServiceFactory::GetForBrowserState(browserState)),
+      signin_manager_observer_(this),
+      first_sync_cycle_is_completed_(false) {
+  signin_manager_observer_.Add(signin_manager_);
+}
+
+SyncedSessionsObserverBridge::~SyncedSessionsObserverBridge() {}
+
+#pragma mark - SyncObserverBridge
+
+void SyncedSessionsObserverBridge::OnStateChanged() {
+  if (!signin_manager_->IsAuthenticated())
+    first_sync_cycle_is_completed_ = false;
+  [owner_ onSyncStateChanged];
+}
+
+void SyncedSessionsObserverBridge::OnSyncCycleCompleted() {
+  if (sync_service_->GetActiveDataTypes().Has(syncer::SESSIONS))
+    first_sync_cycle_is_completed_ = true;
+  [owner_ onSyncStateChanged];
+}
+
+void SyncedSessionsObserverBridge::OnSyncConfigurationCompleted() {
+  [owner_ reloadSessions];
+}
+
+void SyncedSessionsObserverBridge::OnForeignSessionUpdated() {
+  [owner_ reloadSessions];
+}
+
+bool SyncedSessionsObserverBridge::IsFirstSyncCycleCompleted() {
+  return first_sync_cycle_is_completed_;
+}
+
+#pragma mark - SigninManagerBase::Observer
+
+void SyncedSessionsObserverBridge::GoogleSignedOut(
+    const std::string& account_id,
+    const std::string& username) {
+  first_sync_cycle_is_completed_ = false;
+  [owner_ reloadSessions];
+}
+
+}  // namespace synced_sessions