Add missing virtual keyword for methods with OVERRIDE

Source/core/animation/TimedItemTest.cpp

 /*
  * Copyright (c) 2013, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 21 matching lines @@
 #include "core/animation/TimedItem.h"
 
 #include <gtest/gtest.h>
 
 using namespace WebCore;
 
 namespace {
 
 class TestTimedItemEventDelegate : public TimedItem::EventDelegate {
 public:
-    void onEventCondition(const TimedItem* timedItem, bool isFirstSample, TimedItem::Phase previousPhase, double previousIteration) OVERRIDE
+    virtual void onEventCondition(const TimedItem* timedItem, bool isFirstSample, TimedItem::Phase previousPhase, double previousIteration) OVERRIDE
     {
         m_eventTriggered = true;
         m_phaseChanged = previousPhase != timedItem->phase();
         m_iterationChanged = previousIteration != timedItem->currentIteration();
 
     }
     void reset()
     {
         m_eventTriggered = false;
         m_phaseChanged = false;
@@ skipping 15 matching lines @@
     {
         return adoptRef(new TestTimedItem(specified, new TestTimedItemEventDelegate()));
     }
 
     void updateInheritedTime(double time)
     {
         m_eventDelegate->reset();
         TimedItem::updateInheritedTime(time);
     }
 
-    bool updateChildrenAndEffects() const OVERRIDE { return false; }
+    virtual bool updateChildrenAndEffects() const OVERRIDE { return false; }
     void willDetach() { }
     TestTimedItemEventDelegate* eventDelegate() { return m_eventDelegate; }
-    double calculateTimeToEffectChange(double localTime, double timeToNextIteration) const OVERRIDE
+    virtual double calculateTimeToEffectChange(double localTime, double timeToNextIteration) const OVERRIDE
     {
         m_localTime = localTime;
         m_timeToNextIteration = timeToNextIteration;
         return -1;
     }
 
     double takeLocalTime()
     {
         const double result = m_localTime;
         m_localTime = nullValue();
@@ skipping 681 matching lines @@
     EXPECT_TRUE(std::isinf(timedItem->takeTimeToNextIteration()));
 
     // Item has finished.
     timedItem->updateInheritedTime(3.5);
     EXPECT_EQ(TimedItem::PhaseAfter, timedItem->phase());
     EXPECT_EQ(3.5, timedItem->takeLocalTime());
     EXPECT_TRUE(std::isinf(timedItem->takeTimeToNextIteration()));
 }
 
 }