Standardize usage of virtual/override/final in content/

content/shell/renderer/test_runner/mock_web_midi_accessor.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/shell/renderer/test_runner/mock_web_midi_accessor.h"
 
 #include "content/shell/renderer/test_runner/test_interfaces.h"
 #include "content/shell/renderer/test_runner/test_runner.h"
 #include "content/shell/renderer/test_runner/web_test_delegate.h"
 #include "content/shell/renderer/test_runner/web_test_runner.h"
 #include "third_party/WebKit/public/platform/WebMIDIAccessorClient.h"
 
 namespace content {
 
 namespace {
 
 class DidStartSessionTask : public WebMethodTask<MockWebMIDIAccessor> {
  public:
   DidStartSessionTask(MockWebMIDIAccessor* object,
                       blink::WebMIDIAccessorClient* client,
                       bool result)
       : WebMethodTask<MockWebMIDIAccessor>(object),
         client_(client),
         result_(result) {}
 
-  virtual void RunIfValid() override {
+  void RunIfValid() override {
     client_->didStartSession(result_, "InvalidStateError", "");
   }
 
  private:
   blink::WebMIDIAccessorClient* client_;
   bool result_;
 
   DISALLOW_COPY_AND_ASSIGN(DidStartSessionTask);
 };
 
@@ skipping 18 matching lines @@
   client_->didAddOutputPort("MockOutputID",
                             "MockOutputManufacturer",
                             "MockOutputName",
                             "MockOutputVersion",
                             active);
   interfaces_->GetDelegate()->PostTask(new DidStartSessionTask(
       this, client_, interfaces_->GetTestRunner()->midiAccessorResult()));
 }
 
 }  // namespace content