Update {virtual,override,final} to follow C++11 style.

android_webview/native/permission/simple_permission_request.h

Index: android_webview/native/permission/simple_permission_request.h
diff --git a/android_webview/native/permission/simple_permission_request.h b/android_webview/native/permission/simple_permission_request.h
index c232bdf1f74bb489a26bdc95192bb8d7311ba72a..ba6b8708253724f5875a8ba2cd766cce6ddd9865 100644
--- a/android_webview/native/permission/simple_permission_request.h
+++ b/android_webview/native/permission/simple_permission_request.h
@@ -17,12 +17,12 @@ class SimplePermissionRequest : public AwPermissionRequestDelegate {
   SimplePermissionRequest(const GURL& origin,
                           int64 resources,
                           const base::Callback<void(bool)>& callback);
-  virtual ~SimplePermissionRequest();
+  ~SimplePermissionRequest() override;
 
   // AwPermissionRequestDelegate implementation.
-  virtual const GURL& GetOrigin() override;
-  virtual int64 GetResources() override;
-  virtual void NotifyRequestResult(bool allowed) override;
+  const GURL& GetOrigin() override;
+  int64 GetResources() override;
+  void NotifyRequestResult(bool allowed) override;
 
  private:
   const GURL origin_;