Fill in PlatformPrivateFootprint on Linux

base/process/process_metrics_linux.cc

 // 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.
 
 #include "base/process/process_metrics.h"
 
 #include <dirent.h>
 #include <fcntl.h>
 #include <stddef.h>
 #include <stdint.h>
@@ skipping 276 matching lines @@
       target_counter = &io_counters->WriteTransferCount;
     if (!target_counter)
       continue;
     bool converted = StringToUint64(value_str, target_counter);
     DCHECK(converted);
   }
   return true;
 }
 
 #if defined(OS_LINUX)
+
+uint64_t ProcessMetrics::GetVmSwapBytes() const {
+  return ReadProcStatusAndGetFieldAsSizeT(process_, "VmSwap") * 1024;
+}
+
+uint64_t ProcessMetrics::GetRssAnonBytes() const {
+  size_t private_bytes;
+  size_t shared_bytes;
+  bool ret = GetMemoryBytes(&private_bytes, &shared_bytes);
+  if (!ret)
+    return 0;
+  return private_bytes;
+}
+
 int ProcessMetrics::GetOpenFdCount() const {
   // Use /proc/<pid>/fd to count the number of entries there.
   FilePath fd_path = internal::GetProcPidDir(process_).Append("fd");
 
   DirReaderPosix dir_reader(fd_path.value().c_str());
   if (!dir_reader.IsValid())
     return -1;
 
   int total_count = 0;
   for (; dir_reader.Next(); ) {
@@ skipping 653 matching lines @@
 #if defined(OS_LINUX)
 int ProcessMetrics::GetIdleWakeupsPerSecond() {
   uint64_t wake_ups;
   const char kWakeupStat[] = "se.statistics.nr_wakeups";
   return ReadProcSchedAndGetFieldAsUint64(process_, kWakeupStat, &wake_ups) ?
       CalculateIdleWakeupsPerSecond(wake_ups) : 0;
 }
 #endif  // defined(OS_LINUX)
 
 }  // namespace base