direct_memory_pressure_calculator.h: remove 'virtual'

components/memory_pressure/direct_memory_pressure_calculator.h

Index: components/memory_pressure/direct_memory_pressure_calculator.h
diff --git a/components/memory_pressure/direct_memory_pressure_calculator.h b/components/memory_pressure/direct_memory_pressure_calculator.h
index 15520ef41c2e66325f7864d02044eaee73b05599..6774b344ddd7f66d0c8635ea73084112531da259 100644
--- a/components/memory_pressure/direct_memory_pressure_calculator.h
+++ b/components/memory_pressure/direct_memory_pressure_calculator.h
@@ -38,7 +38,7 @@ class DirectMemoryPressureCalculator : public MemoryPressureCalculator {
   DirectMemoryPressureCalculator(int moderate_threshold_mb,
                                  int critical_threshold_mb);
 
-  virtual ~DirectMemoryPressureCalculator() override {}
+  ~DirectMemoryPressureCalculator() override {}
 
   // Calculates the current pressure level.
   MemoryPressureLevel CalculateCurrentPressureLevel() override;