Return unique_ptrs from base::ProcessMetrics.

base/process/process_metrics_freebsd.cc

Index: base/process/process_metrics_freebsd.cc
diff --git a/base/process/process_metrics_freebsd.cc b/base/process/process_metrics_freebsd.cc
index 5fd93cbe1c99d3fb16ca3d9968ff46e681f12ac5..686f6338724da2e11a08ff3c5c4231b833029ccd 100644
--- a/base/process/process_metrics_freebsd.cc
+++ b/base/process/process_metrics_freebsd.cc
@@ -10,20 +10,21 @@
 #include <unistd.h>
 
 #include "base/macros.h"
+#include "base/memory/ptr_util.h"
 #include "base/sys_info.h"
 
 namespace base {
 
 ProcessMetrics::ProcessMetrics(ProcessHandle process)
     : process_(process),
+      processor_count_(SysInfo::NumberOfProcessors()),
       last_system_time_(0),
-      last_cpu_(0) {
-  processor_count_ = base::SysInfo::NumberOfProcessors();
-}
+      last_cpu_(0) {}
 
 // static
-ProcessMetrics* ProcessMetrics::CreateProcessMetrics(ProcessHandle process) {
-  return new ProcessMetrics(process);
+std::unique_ptr<ProcessMetrics> ProcessMetrics::CreateProcessMetrics(
+    ProcessHandle process) {
+  return WrapUnique(new ProcessMetrics(process));

[dcheng, 2016/07/26 05:21:38]

Nit: base::MakeUnique while you're changing this? Similar comments elsewhere.

[Lei Zhang, 2016/07/26 05:53:02]

I guess you missed my comment. How do we deal with private ctors?

 }
 
 size_t ProcessMetrics::GetPagefileUsage() const {