Fix virtual/override/final usage in Source/web/.

Source/web/tests/WebHelperPluginTest.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 "config.h"
 #include "public/web/WebHelperPlugin.h"
 
 #include "platform/testing/UnitTestHelpers.h"
 #include "public/web/WebFrameClient.h"
 #include "public/web/WebLocalFrame.h"
 #include "web/tests/FakeWebPlugin.h"
 #include "web/tests/FrameTestHelpers.h"
 #include <gtest/gtest.h>
 
 namespace blink {
 
 namespace {
 
 class FakePlaceholderWebPlugin : public FakeWebPlugin {
 public:
     FakePlaceholderWebPlugin(WebFrame* frame, const WebPluginParams& params)
         : FakeWebPlugin(frame, params)
     {
     }
-    virtual ~FakePlaceholderWebPlugin() { }
+    ~FakePlaceholderWebPlugin() override {}
 
-    virtual bool isPlaceholder() override { return true; }
+    bool isPlaceholder() override { return true; }
 };
 
 class WebHelperPluginFrameClient : public FrameTestHelpers::TestWebFrameClient {
 public:
-    WebHelperPluginFrameClient() : m_createPlaceholder(false) { }
-    virtual ~WebHelperPluginFrameClient() { }
+    WebHelperPluginFrameClient() : m_createPlaceholder(false) {}
+    ~WebHelperPluginFrameClient() override {}
 
-    virtual WebPlugin* createPlugin(WebLocalFrame* frame, const WebPluginParams& params) override
+    WebPlugin* createPlugin(WebLocalFrame* frame, const WebPluginParams& params) override
     {
         return m_createPlaceholder ? new FakePlaceholderWebPlugin(frame, params) : new FakeWebPlugin(frame, params);
     }
 
     void setCreatePlaceholder(bool createPlaceholder) { m_createPlaceholder = createPlaceholder; }
 
 private:
     bool m_createPlaceholder;
 };
 
 class WebHelperPluginTest : public ::testing::Test {
 protected:
-    virtual void SetUp() override
+    void SetUp() override
     {
         m_helper.initializeAndLoad("about:blank", false, &m_frameClient);
     }
 
 
     void destroyHelperPlugin()
     {
         m_plugin.clear();
         // WebHelperPlugin is destroyed by a task posted to the message loop.
         testing::runPendingTasks();
@@ skipping 28 matching lines @@
 {
     m_frameClient.setCreatePlaceholder(true);
 
     m_plugin = adoptPtr(WebHelperPlugin::create("hello", m_helper.webView()->mainFrame()->toWebLocalFrame()));
     EXPECT_EQ(0, m_plugin.get());
 }
 
 } // namespace
 
 } // namespace