Switch to standard integer types in components/, part 2 of 4.

components/memory_pressure/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_MEMORY_PRESSURE_CALCULATOR_H_
 #define COMPONENTS_MEMORY_PRESSURE_MEMORY_PRESSURE_CALCULATOR_H_
 
+#include "base/macros.h"
 #include "components/memory_pressure/memory_pressure_listener.h"
 
 namespace memory_pressure {
 
 #if defined(MEMORY_PRESSURE_IS_POLLING)
 
 // Interface for a utility class that calculates memory pressure. Only used on
 // platforms without native memory pressure signals.
 class MemoryPressureCalculator {
  public:
   using MemoryPressureLevel = MemoryPressureListener::MemoryPressureLevel;
 
   MemoryPressureCalculator() {}
   virtual ~MemoryPressureCalculator() {}
   virtual MemoryPressureLevel CalculateCurrentPressureLevel() = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MemoryPressureCalculator);
 };
 
 #endif  // defined(MEMORY_PRESSURE_IS_POLLING)
 
 }  // namespace memory_pressure
 
 #endif  // COMPONENTS_MEMORY_PRESSURE_MEMORY_PRESSURE_CALCULATOR_H_