Remove memory_pressure component.

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
deleted file mode 100644
index 98ca61770ea4795888e22f9d85c0ac9a962e0c13..0000000000000000000000000000000000000000
--- a/components/memory_pressure/direct_memory_pressure_calculator.h
+++ /dev/null
@@ -1,14 +0,0 @@
-// 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_DIRECT_MEMORY_PRESSURE_CALCULATOR_H_
-#define COMPONENTS_MEMORY_PRESSURE_DIRECT_MEMORY_PRESSURE_CALCULATOR_H_
-
-#if defined(OS_LINUX)
-#include "components/memory_pressure/direct_memory_pressure_calculator_linux.h"
-#elsif defined(OS_WIN)
-#include "components/memory_pressure/direct_memory_pressure_calculator_win.h"
-#endif  // OS_LINUX
-
-#endif  // COMPONENTS_MEMORY_PRESSURE_DIRECT_MEMORY_PRESSURE_CALCULATOR_H_