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

content/browser/android/java/gin_java_bridge_dispatcher_host.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/android/java/gin_java_bridge_dispatcher_host.h"
 
 #include "base/android/java_handler_thread.h"
 #include "base/android/jni_android.h"
 #include "base/android/scoped_java_ref.h"
 #include "base/atomic_sequence_num.h"
@@ skipping 20 matching lines @@
 namespace content {
 
 namespace {
 // The JavaBridge needs to use a Java thread so the callback
 // will happen on a thread with a prepared Looper.
 class JavaBridgeThread : public base::android::JavaHandlerThread {
  public:
   JavaBridgeThread() : base::android::JavaHandlerThread("JavaBridge") {
     Start();
   }
-  virtual ~JavaBridgeThread() {
-    Stop();
-  }
+  ~JavaBridgeThread() override { Stop(); }
   static bool CurrentlyOn();
 };
 
 base::LazyInstance<JavaBridgeThread> g_background_thread =
     LAZY_INSTANCE_INITIALIZER;
 
 // static
 bool JavaBridgeThread::CurrentlyOn() {
   return base::MessageLoop::current() ==
          g_background_thread.Get().message_loop();
@@ skipping 427 matching lines @@
   if (iter == objects_.end())
     return;
   JavaObjectWeakGlobalRef ref =
       RemoveHolderAndAdvanceLocked(GetCurrentRoutingID(), &iter);
   if (!ref.is_empty()) {
     RemoveFromRetainedObjectSetLocked(ref);
   }
 }
 
 }  // namespace content