Task Scheduler API migration: change BrowserThreadModelWorker to SequencedModelWorker

components/sync/engine/model_safe_worker.h

 // Copyright 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_SYNC_ENGINE_MODEL_SAFE_WORKER_H_
 #define COMPONENTS_SYNC_ENGINE_MODEL_SAFE_WORKER_H_
 
 #include <map>
 #include <memory>
 #include <string>
@@ skipping 48 matching lines @@
   // If not stopped, calls ScheduleWork() to schedule |work| and waits until it
   // is done or abandoned. Otherwise, returns CANNOT_DO_WORK.
   SyncerError DoWorkAndWaitUntilDone(WorkCallback work);
 
   // Soft stop worker by setting stopped_ flag. Called when sync is disabled
   // or browser is shutting down. Called on UI loop.
   virtual void RequestStop();
 
   virtual ModelSafeGroup GetModelSafeGroup() = 0;
 
-  // Returns true if called on the thread this worker works on.
-  virtual bool IsOnModelThread() = 0;
+  // Returns true if called on the sequence this worker works on.
+  virtual bool IsOnModelSequence() = 0;
 
  protected:
   ModelSafeWorker();
   virtual ~ModelSafeWorker();
 
  private:
   friend class base::RefCountedThreadSafe<ModelSafeWorker>;
 
-  // Schedules |work| on the appropriate thread.
+  // Schedules |work| on the appropriate sequence.
   virtual void ScheduleWork(base::OnceClosure work) = 0;
 
   void DoWork(WorkCallback work,
               base::ScopedClosureRunner scoped_closure_runner,
               SyncerError* error,
               bool* did_run);
 
   // Synchronizes access to all members.
   base::Lock lock_;
 
@@ skipping 25 matching lines @@
     const ModelSafeRoutingInfo& routing_info);
 
 ModelTypeSet GetRoutingInfoTypes(const ModelSafeRoutingInfo& routing_info);
 
 ModelSafeGroup GetGroupForModelType(const ModelType type,
                                     const ModelSafeRoutingInfo& routes);
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_ENGINE_MODEL_SAFE_WORKER_H_