Add the "virtual" keyword on method overrides that are missing it.

chrome/browser/renderer_host/redirect_to_file_resource_handler.h

Index: chrome/browser/renderer_host/redirect_to_file_resource_handler.h
diff --git a/chrome/browser/renderer_host/redirect_to_file_resource_handler.h b/chrome/browser/renderer_host/redirect_to_file_resource_handler.h
index 49297117aa1765d7b90995762e36dfc1ccc52b3e..5e8624ae0a61514c39cab467f8ec85e93483aab1 100644
--- a/chrome/browser/renderer_host/redirect_to_file_resource_handler.h
+++ b/chrome/browser/renderer_host/redirect_to_file_resource_handler.h
@@ -35,18 +35,18 @@ class RedirectToFileResourceHandler : public ResourceHandler {
       ResourceDispatcherHost* resource_dispatcher_host);
 
   // ResourceHandler implementation:
-  bool OnUploadProgress(int request_id, uint64 position, uint64 size);
-  bool OnRequestRedirected(int request_id, const GURL& new_url,
-                           ResourceResponse* response, bool* defer);
-  bool OnResponseStarted(int request_id, ResourceResponse* response);
-  bool OnWillStart(int request_id, const GURL& url, bool* defer);
-  bool OnWillRead(int request_id, net::IOBuffer** buf, int* buf_size,
-                  int min_size);
-  bool OnReadCompleted(int request_id, int* bytes_read);
-  bool OnResponseCompleted(int request_id,
-                           const URLRequestStatus& status,
-                           const std::string& security_info);
-  void OnRequestClosed();
+  virtual bool OnUploadProgress(int request_id, uint64 position, uint64 size);
+  virtual bool OnRequestRedirected(int request_id, const GURL& new_url,
+                                   ResourceResponse* response, bool* defer);
+  virtual bool OnResponseStarted(int request_id, ResourceResponse* response);
+  virtual bool OnWillStart(int request_id, const GURL& url, bool* defer);
+  virtual bool OnWillRead(int request_id, net::IOBuffer** buf, int* buf_size,
+                          int min_size);
+  virtual bool OnReadCompleted(int request_id, int* bytes_read);
+  virtual bool OnResponseCompleted(int request_id,
+                                   const URLRequestStatus& status,
+                                   const std::string& security_info);
+  virtual void OnRequestClosed();
 
  private:
   virtual ~RedirectToFileResourceHandler();