Remove memory_pressure component.

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 "base/macros.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:
-  // Defaults to no pressure.
-  TestMemoryPressureCalculator();
-  explicit TestMemoryPressureCalculator(MemoryPressureLevel level);
-  ~TestMemoryPressureCalculator() override {}
-
-  // MemoryPressureCalculator implementation.
-  MemoryPressureLevel CalculateCurrentPressureLevel() override;
-
-  // Sets the mock calculator to return the given pressure level.
-  void SetLevel(MemoryPressureLevel level);
-
-  // Sets the mock calculator to return no pressure.
-  void SetNone();
-
-  // Sets the mock calculator to return moderate pressure.
-  void SetModerate();
-
-  // Sets the mock calculator to return critical pressure.
-  void SetCritical();
-
-  // Resets the call counter to 'CalculateCurrentPressureLevel'.
-  void ResetCalls();
-
-  // Returns the number of calls to 'CalculateCurrentPressureLevel'.
-  int calls() const { return calls_; }
-
- private:
-  MemoryPressureLevel level_;
-  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_