[sync] Display an error when sync settings aren't confirmed

components/browser_sync/profile_sync_service.h

 // 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.
 
 #ifndef COMPONENTS_BROWSER_SYNC_PROFILE_SYNC_SERVICE_H_
 #define COMPONENTS_BROWSER_SYNC_PROFILE_SYNC_SERVICE_H_
 
 #include <memory>
 #include <set>
 #include <string>
@@ skipping 417 matching lines @@
 
   // Returns whether sync is allowed to run based on command-line switches.
   // Profile::IsSyncAllowed() is probably a better signal than this function.
   // This function can be called from any thread, and the implementation doesn't
   // assume it's running on the UI thread.
   static bool IsSyncAllowedByFlag();
 
   // Returns whether sync is currently allowed on this platform.
   bool IsSyncAllowedByPlatform() const;
 
+  // Whether sync is currently blocked from starting because the sync
+  // confirmation dialog hasn't been confirmed.
+  bool IsSyncConfirmationNeeded() const;
+
   // Returns whether sync is managed, i.e. controlled by configuration
   // management. If so, the user is not allowed to configure sync.
   virtual bool IsManaged() const;
 
   // syncer::UnrecoverableErrorHandler implementation.
   void OnUnrecoverableError(const tracked_objects::Location& from_here,
                             const std::string& message) override;
 
   // The functions below (until ActivateDataType()) should only be
   // called if IsEngineInitialized() is true.
@@ skipping 444 matching lines @@
   base::WeakPtrFactory<ProfileSyncService> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileSyncService);
 };
 
 bool ShouldShowActionOnUI(const syncer::SyncProtocolError& error);
 
 }  // namespace browser_sync
 
 #endif  // COMPONENTS_BROWSER_SYNC_PROFILE_SYNC_SERVICE_H_