Standardize usage of virtual/override/final in content/

content/child/appcache/appcache_frontend_impl.h

Index: content/child/appcache/appcache_frontend_impl.h
diff --git a/content/child/appcache/appcache_frontend_impl.h b/content/child/appcache/appcache_frontend_impl.h
index d86cd7c9f9c47e62e2c0b5823dc77c68d19504e9..e0bbdc6999e53c8f5b9ff498e4c7bb80e93edc86 100644
--- a/content/child/appcache/appcache_frontend_impl.h
+++ b/content/child/appcache/appcache_frontend_impl.h
@@ -11,23 +11,21 @@ namespace content {
 
 class AppCacheFrontendImpl : public AppCacheFrontend {
  public:
-  virtual void OnCacheSelected(int host_id,
-                               const AppCacheInfo& info) override;
-  virtual void OnStatusChanged(const std::vector<int>& host_ids,
-                               AppCacheStatus status) override;
-  virtual void OnEventRaised(const std::vector<int>& host_ids,
-                             AppCacheEventID event_id) override;
-  virtual void OnProgressEventRaised(const std::vector<int>& host_ids,
-                                     const GURL& url,
-                                     int num_total,
-                                     int num_complete) override;
-  virtual void OnErrorEventRaised(const std::vector<int>& host_ids,
-                                  const AppCacheErrorDetails& details)
-      override;
-  virtual void OnLogMessage(int host_id,
-                            AppCacheLogLevel log_level,
-                            const std::string& message) override;
-  virtual void OnContentBlocked(int host_id, const GURL& manifest_url) override;
+  void OnCacheSelected(int host_id, const AppCacheInfo& info) override;
+  void OnStatusChanged(const std::vector<int>& host_ids,
+                       AppCacheStatus status) override;
+  void OnEventRaised(const std::vector<int>& host_ids,
+                     AppCacheEventID event_id) override;
+  void OnProgressEventRaised(const std::vector<int>& host_ids,
+                             const GURL& url,
+                             int num_total,
+                             int num_complete) override;
+  void OnErrorEventRaised(const std::vector<int>& host_ids,
+                          const AppCacheErrorDetails& details) override;
+  void OnLogMessage(int host_id,
+                    AppCacheLogLevel log_level,
+                    const std::string& message) override;
+  void OnContentBlocked(int host_id, const GURL& manifest_url) override;
 };
 
 }  // namespace content