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

Source/platform/transforms/MatrixTransformOperation.h

Index: Source/platform/transforms/MatrixTransformOperation.h
diff --git a/Source/platform/transforms/MatrixTransformOperation.h b/Source/platform/transforms/MatrixTransformOperation.h
index d6865a2935a243d2b088142e29c356275fd96730..15aa09cd5d84fcf6e766454b4d27d5db51bb0042 100644
--- a/Source/platform/transforms/MatrixTransformOperation.h
+++ b/Source/platform/transforms/MatrixTransformOperation.h
@@ -50,9 +50,9 @@ public:
     }
 
 private:
-    virtual OperationType type() const override { return Matrix; }
+    OperationType type() const override { return Matrix; }
 
-    virtual bool operator==(const TransformOperation& o) const override
+    bool operator==(const TransformOperation& o) const override
     {
         if (!isSameType(o))
             return false;
@@ -61,13 +61,13 @@ private:
         return m_a == m->m_a && m_b == m->m_b && m_c == m->m_c && m_d == m->m_d && m_e == m->m_e && m_f == m->m_f;
     }
 
-    virtual void apply(TransformationMatrix& transform, const FloatSize&) const override
+    void apply(TransformationMatrix& transform, const FloatSize&) const override
     {
         TransformationMatrix matrix(m_a, m_b, m_c, m_d, m_e, m_f);
         transform.multiply(matrix);
     }
 
-    virtual PassRefPtr<TransformOperation> blend(const TransformOperation* from, double progress, bool blendToIdentity = false) override;
+    PassRefPtr<TransformOperation> blend(const TransformOperation* from, double progress, bool blendToIdentity = false) override;
 
     MatrixTransformOperation(double a, double b, double c, double d, double e, double f)
         : m_a(a)