[Sync] Rename SyncEnabledAndLoggedIn() to CanStartSync().

components/sync_driver/sync_service.h

 // 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.
 
 #ifndef COMPONENTS_SYNC_DRIVER_SYNC_SERVICE_H_
 #define COMPONENTS_SYNC_DRIVER_SYNC_SERVICE_H_
 
 #include <string>
 
 #include "base/macros.h"
@@ skipping 49 matching lines @@
   virtual void AddObserver(SyncServiceObserver* observer) = 0;
   virtual void RemoveObserver(SyncServiceObserver* observer) = 0;
 
   // Returns true if |observer| has already been added as an observer.
   virtual bool HasObserver(const SyncServiceObserver* observer) const = 0;
 
   // ---------------------------------------------------------------------------
   // TODO(sync): The methods below were pulled from ProfileSyncService, and
   // should be evaluated to see if they should stay.
 
-  // Returns true if sync is enabled/not suppressed and the user is logged in.
+  // Returns true if sync is allowed, requested, and the user is logged in.
   // (being logged in does not mean that tokens are available - tokens may
   // be missing because they have not loaded yet, or because they were deleted
   // due to http://crbug.com/121755).
-  // Virtual to enable mocking in tests.
-  // TODO(tim): Remove this? Nothing in ProfileSyncService uses it, and outside
-  // callers use a seemingly arbitrary / redundant / bug prone combination of
-  // this method, IsSyncAllowed, and others.
-  virtual bool IsSyncEnabledAndLoggedIn() = 0;
+  virtual bool CanSyncStart() const = 0;
 
   // Disables sync for user. Use ShowLoginDialog to enable.
   virtual void DisableForUser() = 0;
 
   // Stops sync at the user's request.
   virtual void RequestStop() = 0;
 
   // The user requests that sync start. This only actually starts sync if
   // IsSyncAllowed is true and the user is signed in. Once sync starts,
   // other things such as HasSyncSetupCompleted being false can still prevent
@@ skipping 80 matching lines @@
  protected:
   SyncService() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SyncService);
 };
 
 }  // namespace sync_driver
 
 #endif  // COMPONENTS_SYNC_DRIVER_SYNC_SERVICE_H_