Standardize usage of virtual/override/final in content/browser/

content/browser/download/mhtml_generation_manager.cc

Index: content/browser/download/mhtml_generation_manager.cc
diff --git a/content/browser/download/mhtml_generation_manager.cc b/content/browser/download/mhtml_generation_manager.cc
index 516f780cd0f079c305600b413e19e6fb2eda0080..d02d509996a2c76e6d57f6e3931ebf0671d15487 100644
--- a/content/browser/download/mhtml_generation_manager.cc
+++ b/content/browser/download/mhtml_generation_manager.cc
@@ -19,7 +19,7 @@ namespace content {
 class MHTMLGenerationManager::Job : public RenderProcessHostObserver {
  public:
   Job();
-  virtual ~Job();
+  ~Job() override;
 
   void SetWebContents(WebContents* web_contents);
 
@@ -33,11 +33,10 @@ class MHTMLGenerationManager::Job : public RenderProcessHostObserver {
   void set_callback(GenerateMHTMLCallback callback) { callback_ = callback; }
 
   // RenderProcessHostObserver:
-  virtual void RenderProcessExited(RenderProcessHost* host,
-                                   base::TerminationStatus status,
-                                   int exit_code) override;
-  virtual void RenderProcessHostDestroyed(RenderProcessHost* host) override;
-
+  void RenderProcessExited(RenderProcessHost* host,
+                           base::TerminationStatus status,
+                           int exit_code) override;
+  void RenderProcessHostDestroyed(RenderProcessHost* host) override;
 
  private:
   // The handle to the file the MHTML is saved to for the browser process.