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

net/proxy/proxy_config_service_android.cc

Index: net/proxy/proxy_config_service_android.cc
diff --git a/net/proxy/proxy_config_service_android.cc b/net/proxy/proxy_config_service_android.cc
index 80e3b929b454261cb0b6ab10e2e6b900f29be83f..503388aa439e7539a243d9af22c99a83c9b16ed3 100644
--- a/net/proxy/proxy_config_service_android.cc
+++ b/net/proxy/proxy_config_service_android.cc
@@ -302,12 +302,12 @@ class ProxyConfigServiceAndroid::Delegate
     explicit JNIDelegateImpl(Delegate* delegate) : delegate_(delegate) {}
 
     // ProxyConfigServiceAndroid::JNIDelegate overrides.
-    virtual void ProxySettingsChangedTo(JNIEnv* env,
-                                        jobject jself,
-                                        jstring jhost,
-                                        jint jport,
-                                        jstring jpac_url,
-                                        jobjectArray jexclusion_list) override {
+    void ProxySettingsChangedTo(JNIEnv* env,
+                                jobject jself,
+                                jstring jhost,
+                                jint jport,
+                                jstring jpac_url,
+                                jobjectArray jexclusion_list) override {
       std::string host = ConvertJavaStringToUTF8(env, jhost);
       std::string pac_url;
       if (jpac_url)
@@ -318,7 +318,7 @@ class ProxyConfigServiceAndroid::Delegate
       delegate_->ProxySettingsChangedTo(host, jport, pac_url, exclusion_list);
     }
 
-    virtual void ProxySettingsChanged(JNIEnv* env, jobject self) override {
+    void ProxySettingsChanged(JNIEnv* env, jobject self) override {
       delegate_->ProxySettingsChanged();
     }