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

android_webview/native/aw_media_url_interceptor.h

Index: android_webview/native/aw_media_url_interceptor.h
diff --git a/android_webview/native/aw_media_url_interceptor.h b/android_webview/native/aw_media_url_interceptor.h
index a6370a9db893e317eb3c5666e16ec7462ad724e1..332fd37393ba2b7a8b7eeb16fd2b5417cd54cd83 100644
--- a/android_webview/native/aw_media_url_interceptor.h
+++ b/android_webview/native/aw_media_url_interceptor.h
@@ -15,10 +15,10 @@ namespace android_webview {
 // Interceptor to handle urls for media assets in the apk.
 class AwMediaUrlInterceptor : public media::MediaUrlInterceptor {
  public:
-  virtual bool Intercept(const std::string& url,
-                         int* fd,
-                         int64* offset,
-                         int64* size) const override;
+  bool Intercept(const std::string& url,
+                 int* fd,
+                 int64* offset,
+                 int64* size) const override;
 };
 
 }  // namespace android_webview