Memory-monitor for Mac.

content/browser/memory/test_memory_monitor.h

 // Copyright (c) 2016 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 CONTENT_BROWSER_MEMORY_TEST_MEMORY_MONITOR_H_
 #define CONTENT_BROWSER_MEMORY_TEST_MEMORY_MONITOR_H_
 
 #include "content/browser/memory/memory_monitor.h"
 
 #include "base/process/process_metrics.h"
 
 namespace content {
 
 // A delegate that allows mocking the various inputs to MemoryMonitor.
 class TestMemoryMonitorDelegate : public MemoryMonitorDelegate {
  public:
-  TestMemoryMonitorDelegate() : calls_(0) { mem_info_ = {}; }
+  TestMemoryMonitorDelegate() { mem_info_ = {}; }
   ~TestMemoryMonitorDelegate() override;
 
   void GetSystemMemoryInfo(base::SystemMemoryInfoKB* mem_info) override;
+  bool GetSystemMemoryPressure(int* mem_pressure) override;
 
   size_t calls() const { return calls_; }
   void ResetCalls() { calls_ = 0; }
 
+  void SetMemoryPressure(int mem_pressure) {
+    mem_pressure_ = mem_pressure;
+    mem_pressure_valid_ = true;
+  }
+
   void SetTotalMemoryKB(int total_memory_kb) {
     mem_info_.total = total_memory_kb;
   }
 
  protected:
   // Because the fields of SystemMemoryInfoKB vary depending on the operating
   // system, specific derived classes will have to provide methods to load
   // values into |mem_info_|;
   base::SystemMemoryInfoKB mem_info_;
 
  private:
-  size_t calls_;
+  int mem_pressure_ = -1;
+  int mem_pressure_valid_ = false;
+  size_t calls_ = 0;
 
   DISALLOW_COPY_AND_ASSIGN(TestMemoryMonitorDelegate);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_MEMORY_TEST_MEMORY_MONITOR_H_