Fill in PlatformPrivateFootprint on Linux 2/2

base/process/process_metrics.h

 // Copyright (c) 2013 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.
 
 // This file contains routines for gathering resource statistics for processes
 // running on the system.
 
 #ifndef BASE_PROCESS_PROCESS_METRICS_H_
 #define BASE_PROCESS_PROCESS_METRICS_H_
 
@@ skipping 207 matching lines @@
 #if defined(OS_LINUX) || defined(OS_AIX)
   // Returns the number of file descriptors currently open by the process, or
   // -1 on error.
   int GetOpenFdCount() const;
 
   // Returns the soft limit of file descriptors that can be opened by the
   // process, or -1 on error.
   int GetOpenFdSoftLimit() const;
 #endif  // defined(OS_LINUX) || defined(OS_AIX)
 
+#if defined(OS_LINUX) || defined(OS_ANDROID)
+  // Bytes of swap as reported by /proc/[pid]/status.
+  uint64_t GetVmSwapBytes() const;
+#endif  // defined(OS_LINUX) || defined(OS_ANDROID)
+
  private:
 #if !defined(OS_MACOSX) || defined(OS_IOS)
   explicit ProcessMetrics(ProcessHandle process);
 #else
   ProcessMetrics(ProcessHandle process, PortProvider* port_provider);
 #endif  // !defined(OS_MACOSX) || defined(OS_IOS)
 
 #if defined(OS_LINUX) || defined(OS_ANDROID) | defined(OS_AIX)
   bool GetWorkingSetKBytesStatm(WorkingSetKBytes* ws_usage) const;
 #endif
@@ skipping 294 matching lines @@
 // |size| and |info| are output parameters, only valid on Success.
 BASE_EXPORT MachVMRegionResult GetBasicInfo(mach_port_t task,
                                             mach_vm_size_t* size,
                                             mach_vm_address_t* address,
                                             vm_region_basic_info_64* info);
 #endif  // defined(OS_MACOSX) && !defined(OS_IOS)
 
 }  // namespace base
 
 #endif  // BASE_PROCESS_PROCESS_METRICS_H_