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

chrome/browser/sync/test/integration/sync_test.cc

Index: chrome/browser/sync/test/integration/sync_test.cc
diff --git a/chrome/browser/sync/test/integration/sync_test.cc b/chrome/browser/sync/test/integration/sync_test.cc
index f3c5d9bc35bb2c3bbaa2f695df4e6cf173ef6ab5..dc27dc4abcc9d9c76255bcace0833942c7d06a44 100644
--- a/chrome/browser/sync/test/integration/sync_test.cc
+++ b/chrome/browser/sync/test/integration/sync_test.cc
@@ -98,7 +98,7 @@ class SyncServerStatusChecker : public net::URLFetcherDelegate {
  public:
   SyncServerStatusChecker() : running_(false) {}
 
-  virtual void OnURLFetchComplete(const net::URLFetcher* source) override {
+  void OnURLFetchComplete(const net::URLFetcher* source) override {
     std::string data;
     source->GetResponseAsString(&data);
     running_ =
@@ -123,13 +123,11 @@ class EncryptionChecker : public SingleClientStatusChangeChecker {
   explicit EncryptionChecker(ProfileSyncService* service)
       : SingleClientStatusChangeChecker(service) {}
 
-  virtual bool IsExitConditionSatisfied() override {
+  bool IsExitConditionSatisfied() override {
     return IsEncryptionComplete(service());
   }
 
-  virtual std::string GetDebugMessage() const override {
-    return "Encryption";
-  }
+  std::string GetDebugMessage() const override { return "Encryption"; }
 };
 
 void SetupNetworkCallback(