Change outputting ints in win/linux GetCpuUsage to doubles.

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 <sys/stat.h>
 #include <sys/time.h>
@@ skipping 210 matching lines @@
   if (time_delta == 0)
     return 0;
 
   int cpu = GetProcessCPU(process_);
 
   // We have the number of jiffies in the time period.  Convert to percentage.
   // Note this means we will go *over* 100 in the case where multiple threads
   // are together adding to more than one CPU's worth.
   TimeDelta cpu_time = internal::ClockTicksToTimeDelta(cpu);
   TimeDelta last_cpu_time = internal::ClockTicksToTimeDelta(last_cpu_);
-  int percentage = 100 * (cpu_time - last_cpu_time).InSecondsF() /
+  double percentage = 100.0 * (cpu_time - last_cpu_time).InSecondsF() /
       TimeDelta::FromMicroseconds(time_delta).InSecondsF();
 
   last_cpu_time_ = time;
   last_cpu_ = cpu;
 
   return percentage;
 }
 
 // To have /proc/self/io file you must enable CONFIG_TASK_IO_ACCOUNTING
 // in your kernel configuration.
@@ skipping 665 matching lines @@
 #if defined(OS_LINUX)
 int ProcessMetrics::GetIdleWakeupsPerSecond() {
   uint64 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