One more memory_pressure style fix

components/memory_pressure/test_memory_pressure_calculator.h

 // Copyright 2015 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.
 
 #ifndef COMPONENTS_MEMORY_PRESSURE_TEST_MEMORY_PRESSURE_CALCULATOR_H_
 #define COMPONENTS_MEMORY_PRESSURE_TEST_MEMORY_PRESSURE_CALCULATOR_H_
 
 #include "components/memory_pressure/memory_pressure_calculator.h"
 
 namespace memory_pressure {
 
 #if defined(MEMORY_PRESSURE_IS_POLLING)
 
 // A mock memory pressure calculator for unittesting.
 class TestMemoryPressureCalculator : public MemoryPressureCalculator {
  public:
   TestMemoryPressureCalculator();
-  virtual ~TestMemoryPressureCalculator() {}
+  ~TestMemoryPressureCalculator() override {}
 
   // MemoryPressureCalculator implementation.
   MemoryPressureLevel CalculateCurrentPressureLevel() override;
 
   // Sets the mock calculator to return no pressure.
   void SetNone();
 
   // Sets the mock calculator to return moderate pressure.
   void SetModerate();
 
@@ skipping 11 matching lines @@
   int calls_;
 
   DISALLOW_COPY_AND_ASSIGN(TestMemoryPressureCalculator);
 };
 
 #endif  // defined(MEMORY_PRESSURE_IS_POLLING)
 
 }  // namespace memory_pressure
 
 #endif  // COMPONENTS_MEMORY_PRESSURE_TEST_MEMORY_PRESSURE_CALCULATOR_H_