Replace OVERRIDE and FINAL with override and final in content/plugin/[a-s]*

content/plugin/plugin_thread.cc

Index: content/plugin/plugin_thread.cc
diff --git a/content/plugin/plugin_thread.cc b/content/plugin/plugin_thread.cc
index ddef4ee8a0ac173d8f04a8a9d4dfde19aaf5f201..f1b8d95b23395d908eb17f80f8ae0cbe038008b8 100644
--- a/content/plugin/plugin_thread.cc
+++ b/content/plugin/plugin_thread.cc
@@ -42,7 +42,7 @@ class EnsureTerminateMessageFilter : public IPC::MessageFilter {
   virtual ~EnsureTerminateMessageFilter() {}
 
   // IPC::MessageFilter:
-  virtual void OnChannelError() OVERRIDE {
+  virtual void OnChannelError() override {
     // How long we wait before forcibly shutting down the process.
     const base::TimeDelta kPluginProcessTerminateTimeout =
         base::TimeDelta::FromSeconds(3);