Standardize usage of virtual/override/final in content/

content/child/npapi/plugin_url_fetcher.h

Index: content/child/npapi/plugin_url_fetcher.h
diff --git a/content/child/npapi/plugin_url_fetcher.h b/content/child/npapi/plugin_url_fetcher.h
index dcedb8abcfccccaa2b56839b1fbc8cbbd84e5700..57eb5a5beba4f9bb18dade46c6f1e558ca511b9e 100644
--- a/content/child/npapi/plugin_url_fetcher.h
+++ b/content/child/npapi/plugin_url_fetcher.h
@@ -34,7 +34,7 @@ class PluginURLFetcher : public RequestPeer {
                    int render_view_id,
                    unsigned long resource_id,
                    bool copy_stream_data);
-  virtual ~PluginURLFetcher();
+  ~PluginURLFetcher() override;
 
   // Cancels the current request.
   void Cancel();
@@ -52,20 +52,20 @@ class PluginURLFetcher : public RequestPeer {
 
  private:
   // RequestPeer implementation:
-  virtual void OnUploadProgress(uint64 position, uint64 size) override;
-  virtual bool OnReceivedRedirect(const net::RedirectInfo& redirect_info,
-                                  const ResourceResponseInfo& info) override;
-  virtual void OnReceivedResponse(const ResourceResponseInfo& info) override;
-  virtual void OnDownloadedData(int len, int encoded_data_length) override;
-  virtual void OnReceivedData(const char* data,
-                              int data_length,
-                              int encoded_data_length) override;
-  virtual void OnCompletedRequest(int error_code,
-                                  bool was_ignored_by_handler,
-                                  bool stale_copy_in_cache,
-                                  const std::string& security_info,
-                                  const base::TimeTicks& completion_time,
-                                  int64 total_transfer_size) override;
+  void OnUploadProgress(uint64 position, uint64 size) override;
+  bool OnReceivedRedirect(const net::RedirectInfo& redirect_info,
+                          const ResourceResponseInfo& info) override;
+  void OnReceivedResponse(const ResourceResponseInfo& info) override;
+  void OnDownloadedData(int len, int encoded_data_length) override;
+  void OnReceivedData(const char* data,
+                      int data_length,
+                      int encoded_data_length) override;
+  void OnCompletedRequest(int error_code,
+                          bool was_ignored_by_handler,
+                          bool stale_copy_in_cache,
+                          const std::string& security_info,
+                          const base::TimeTicks& completion_time,
+                          int64 total_transfer_size) override;
 
   // |plugin_stream_| becomes NULL after Cancel() to ensure no further calls
   // |reach it.