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

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

Index: chrome/browser/sync/test/integration/extensions_helper.cc
diff --git a/chrome/browser/sync/test/integration/extensions_helper.cc b/chrome/browser/sync/test/integration/extensions_helper.cc
index 90b33d2419f4f160cda3a2a0fcb4fda3ef3c4cc4..a966379052f922cb5caa938bc058f92e568ea0ff 100644
--- a/chrome/browser/sync/test/integration/extensions_helper.cc
+++ b/chrome/browser/sync/test/integration/extensions_helper.cc
@@ -141,28 +141,25 @@ class ExtensionsMatchChecker : public StatusChangeChecker,
                                public extensions::ExtensionRegistryObserver {
  public:
   explicit ExtensionsMatchChecker(const std::vector<Profile*>& profiles);
-  virtual ~ExtensionsMatchChecker();
+  ~ExtensionsMatchChecker() override;
 
   // StatusChangeChecker implementation.
-  virtual std::string GetDebugMessage() const override;
-  virtual bool IsExitConditionSatisfied() override;
+  std::string GetDebugMessage() const override;
+  bool IsExitConditionSatisfied() override;
 
   // extensions::ExtensionRegistryObserver implementation.
-  virtual void OnExtensionLoaded(
-      content::BrowserContext* context,
-      const extensions::Extension* extension) override;
-  virtual void OnExtensionUnloaded(
+  void OnExtensionLoaded(content::BrowserContext* context,
+                         const extensions::Extension* extension) override;
+  void OnExtensionUnloaded(
       content::BrowserContext* context,
       const extensions::Extension* extenion,
       extensions::UnloadedExtensionInfo::Reason reason) override;
-  virtual void OnExtensionInstalled(
-      content::BrowserContext* browser_context,
-      const extensions::Extension* extension,
-      bool is_update) override;
-  virtual void OnExtensionUninstalled(
-      content::BrowserContext* browser_context,
-      const extensions::Extension* extension,
-      extensions::UninstallReason reason) override;
+  void OnExtensionInstalled(content::BrowserContext* browser_context,
+                            const extensions::Extension* extension,
+                            bool is_update) override;
+  void OnExtensionUninstalled(content::BrowserContext* browser_context,
+                              const extensions::Extension* extension,
+                              extensions::UninstallReason reason) override;
 
   void Wait();