Standardize usage of virtual/override/final in content/

content/child/appcache/appcache_backend_proxy.h

Index: content/child/appcache/appcache_backend_proxy.h
diff --git a/content/child/appcache/appcache_backend_proxy.h b/content/child/appcache/appcache_backend_proxy.h
index c4294ea13d579e715ff8e335993da77bd07eb834..ee41cb933feb7421eae479f97f0964f7bb41ecfb 100644
--- a/content/child/appcache/appcache_backend_proxy.h
+++ b/content/child/appcache/appcache_backend_proxy.h
@@ -20,28 +20,24 @@ class AppCacheBackendProxy : public AppCacheBackend {
   IPC::Sender* sender() const { return sender_; }
 
   // AppCacheBackend methods
-  virtual void RegisterHost(int host_id) override;
-  virtual void UnregisterHost(int host_id) override;
-  virtual void SetSpawningHostId(int host_id, int spawning_host_id) override;
-  virtual void SelectCache(int host_id,
-                           const GURL& document_url,
-                           const int64 cache_document_was_loaded_from,
-                           const GURL& manifest_url) override;
-  virtual void SelectCacheForWorker(
-                           int host_id,
-                           int parent_process_id,
-                           int parent_host_id) override;
-  virtual void SelectCacheForSharedWorker(
-                           int host_id,
-                           int64 appcache_id) override;
-  virtual void MarkAsForeignEntry(
-      int host_id,
-      const GURL& document_url,
-      int64 cache_document_was_loaded_from) override;
-  virtual AppCacheStatus GetStatus(int host_id) override;
-  virtual bool StartUpdate(int host_id) override;
-  virtual bool SwapCache(int host_id) override;
-  virtual void GetResourceList(
+  void RegisterHost(int host_id) override;
+  void UnregisterHost(int host_id) override;
+  void SetSpawningHostId(int host_id, int spawning_host_id) override;
+  void SelectCache(int host_id,
+                   const GURL& document_url,
+                   const int64 cache_document_was_loaded_from,
+                   const GURL& manifest_url) override;
+  void SelectCacheForWorker(int host_id,
+                            int parent_process_id,
+                            int parent_host_id) override;
+  void SelectCacheForSharedWorker(int host_id, int64 appcache_id) override;
+  void MarkAsForeignEntry(int host_id,
+                          const GURL& document_url,
+                          int64 cache_document_was_loaded_from) override;
+  AppCacheStatus GetStatus(int host_id) override;
+  bool StartUpdate(int host_id) override;
+  bool SwapCache(int host_id) override;
+  void GetResourceList(
       int host_id,
       std::vector<AppCacheResourceInfo>* resource_infos) override;