[ChromeOS] Add Swapped Memory to TaskManager

chrome/browser/task_management/task_manager_interface.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 CHROME_BROWSER_TASK_MANAGEMENT_TASK_MANAGER_INTERFACE_H_
 #define CHROME_BROWSER_TASK_MANAGEMENT_TASK_MANAGER_INTERFACE_H_
 
 #include <stddef.h>
 #include <stdint.h>
 #include <utility>
@@ skipping 43 matching lines @@
   // returns the CPU usage in percent for the process on which the task with
   // |task_id| is running during the current refresh cycle.
   virtual double GetCpuUsage(TaskId task_id) const = 0;
 
   // Returns the current physical/private/shared memory usage of the task with
   // |task_id| in bytes. A value of -1 means no valid value is currently
   // available.
   virtual int64_t GetPhysicalMemoryUsage(TaskId task_id) const = 0;
   virtual int64_t GetPrivateMemoryUsage(TaskId task_id) const = 0;
   virtual int64_t GetSharedMemoryUsage(TaskId task_id) const = 0;
+  virtual int64_t GetSwappedMemoryUsage(TaskId task_id) const = 0;
 
   // Returns the GPU memory usage of the task with |task_id| in bytes. A value
   // of -1 means no valid value is currently available.
   // |has_duplicates| will be set to true if this process' GPU resource count is
   // inflated because it is counting other processes' resources.
   virtual int64_t GetGpuMemoryUsage(TaskId task_id,
                                     bool* has_duplicates) const = 0;
 
   // Returns the number of average idle CPU wakeups per second since the last
   // refresh cycle. A value of -1 means no valid value is currently available.
@@ skipping 171 matching lines @@
 
   // The flags containing the enabled resources types calculations.
   int64_t enabled_resources_flags_;
 
   DISALLOW_COPY_AND_ASSIGN(TaskManagerInterface);
 };
 
 }  // namespace task_management
 
 #endif  // CHROME_BROWSER_TASK_MANAGEMENT_TASK_MANAGER_INTERFACE_H_