Standardize usage of virtual/override/final in content/

content/shell/tools/plugin/Tests/FormValue.cpp

 // 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 "PluginTest.h"
 #include <string.h>
 
 extern NPNetscapeFuncs *browser;
 
 class FormValue : public PluginTest {
 public:
     FormValue(NPP npp, const std::string& identifier)
         : PluginTest(npp, identifier)
     {
     }
-    virtual NPError NPP_GetValue(NPPVariable, void*) override;
+    NPError NPP_GetValue(NPPVariable, void*) override;
 };
 
 NPError FormValue::NPP_GetValue(NPPVariable variable, void *value)
 {
     if (variable == NPPVformValue) {
         static const char formValueText[] = "Plugin form value";
         *((void**)value) = browser->memalloc(sizeof(formValueText));
         if (!*((void**)value))
             return NPERR_OUT_OF_MEMORY_ERROR;
         strncpy(*((char**)value), formValueText, sizeof(formValueText));
         return NPERR_NO_ERROR;
     }
     return NPERR_GENERIC_ERROR;
 }
 
 static PluginTest::Register<FormValue> formValue("form-value");