Revert 202639 "Use totmaps if available on chromeos"

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 152 matching lines @@
   // otherwise.
   bool GetIOCounters(IoCounters* io_counters) const;
 
  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)
+  bool GetWorkingSetKBytesStatm(WorkingSetKBytes* ws_usage) const;
+#endif
+
+#if defined(OS_CHROMEOS)
+  bool GetWorkingSetKBytesTotmaps(WorkingSetKBytes *ws_usage) const;
+#endif
+
   ProcessHandle process_;
 
   int processor_count_;
 
   // Used to store the previous times and CPU usage counts so we can
   // compute the CPU usage between calls.
   int64 last_time_;
   int64 last_system_time_;
 
 #if !defined(OS_IOS)
@@ skipping 42 matching lines @@
 };
 // Retrieves data from /proc/meminfo about system-wide memory consumption.
 // Fills in the provided |meminfo| structure. Returns true on success.
 // Exposed for memory debugging widget.
 BASE_EXPORT bool GetSystemMemoryInfo(SystemMemoryInfoKB* meminfo);
 #endif  // defined(OS_LINUX) || defined(OS_ANDROID)
 
 }  // namespace base
 
 #endif  // BASE_PROCESS_PROCESS_METRICS_H_