replace OVERRIDE and FINAL with override and final in extensions/

extensions/browser/api/serial/serial_apitest.cc

Index: extensions/browser/api/serial/serial_apitest.cc
diff --git a/extensions/browser/api/serial/serial_apitest.cc b/extensions/browser/api/serial/serial_apitest.cc
index db7617a0563d4cb86c3f8ea2c6f83293a9182551..9fd50886252f0a9997a8c8671cc6d4b3d85f253b 100644
--- a/extensions/browser/api/serial/serial_apitest.cc
+++ b/extensions/browser/api/serial/serial_apitest.cc
@@ -29,7 +29,7 @@ namespace extensions {
 
 class FakeSerialGetDevicesFunction : public AsyncExtensionFunction {
  public:
-  virtual bool RunAsync() OVERRIDE {
+  virtual bool RunAsync() override {
     base::ListValue* devices = new base::ListValue();
     base::DictionaryValue* device0 = new base::DictionaryValue();
     device0->SetString("path", "/dev/fakeserial");
@@ -69,7 +69,7 @@ class FakeSerialConnectFunction : public core_api::SerialConnectFunction {
  protected:
   virtual SerialConnection* CreateSerialConnection(
       const std::string& port,
-      const std::string& owner_extension_id) const OVERRIDE {
+      const std::string& owner_extension_id) const override {
     scoped_refptr<FakeEchoSerialIoHandler> io_handler =
         new FakeEchoSerialIoHandler;
     EXPECT_CALL(*io_handler.get(), SetControlSignals(_)).Times(1).WillOnce(