Standardize usage of virtual/override/final in chrome/browser/sync_file_system/

chrome/browser/sync_file_system/sync_file_system_service.cc

Index: chrome/browser/sync_file_system/sync_file_system_service.cc
diff --git a/chrome/browser/sync_file_system/sync_file_system_service.cc b/chrome/browser/sync_file_system/sync_file_system_service.cc
index 730708bec03ee394b7f307b971e2c25b01c5c9f3..5f306484bbfc07170f7105ba18fe1c2a1957cf9c 100644
--- a/chrome/browser/sync_file_system/sync_file_system_service.cc
+++ b/chrome/browser/sync_file_system/sync_file_system_service.cc
@@ -150,14 +150,14 @@ class LocalSyncRunner : public SyncProcessRunner,
                           1  /* max_parallel_task */),
         factory_(this) {}
 
-  virtual void StartSync(const SyncStatusCallback& callback) override {
+  void StartSync(const SyncStatusCallback& callback) override {
     GetSyncService()->local_service_->ProcessLocalChange(
         base::Bind(&LocalSyncRunner::DidProcessLocalChange,
                    factory_.GetWeakPtr(), callback));
   }
 
   // LocalFileSyncService::Observer overrides.
-  virtual void OnLocalChangeAvailable(int64 pending_changes) override {
+  void OnLocalChangeAvailable(int64 pending_changes) override {
     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
     OnChangesUpdated(pending_changes);
@@ -196,18 +196,18 @@ class RemoteSyncRunner : public SyncProcessRunner,
         last_state_(REMOTE_SERVICE_OK),
         factory_(this) {}
 
-  virtual void StartSync(const SyncStatusCallback& callback) override {
+  void StartSync(const SyncStatusCallback& callback) override {
     remote_service_->ProcessRemoteChange(
         base::Bind(&RemoteSyncRunner::DidProcessRemoteChange,
                    factory_.GetWeakPtr(), callback));
   }
 
-  virtual SyncServiceState GetServiceState() override {
+  SyncServiceState GetServiceState() override {
     return RemoteStateToSyncServiceState(last_state_);
   }
 
   // RemoteFileSyncService::Observer overrides.
-  virtual void OnRemoteChangeQueueUpdated(int64 pending_changes) override {
+  void OnRemoteChangeQueueUpdated(int64 pending_changes) override {
     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
     OnChangesUpdated(pending_changes);
@@ -216,9 +216,8 @@ class RemoteSyncRunner : public SyncProcessRunner,
     GetSyncService()->RunForEachSyncRunners(&SyncProcessRunner::Schedule);
   }
 
-  virtual void OnRemoteServiceStateUpdated(
-      RemoteServiceState state,
-      const std::string& description) override {
+  void OnRemoteServiceStateUpdated(RemoteServiceState state,
+                                   const std::string& description) override {
     // Just forward to SyncFileSystemService.
     GetSyncService()->OnRemoteServiceStateUpdated(state, description);
     last_state_ = state;