Return unique_ptrs from base::ProcessMetrics.

components/tracing/common/process_metrics_memory_dump_provider.cc

 // Copyright 2015 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 "components/tracing/common/process_metrics_memory_dump_provider.h"
 
 #include <fcntl.h>
 #include <stdint.h>
 
 #include <map>
@@ skipping 142 matching lines @@
       }
     }
   }
   return num_valid_regions;
 }
 #endif  // defined(OS_LINUX) || defined(OS_ANDROID)
 
 std::unique_ptr<base::ProcessMetrics> CreateProcessMetrics(
     base::ProcessId process) {
   if (process == base::kNullProcessId)
-    return base::WrapUnique(
-        base::ProcessMetrics::CreateCurrentProcessMetrics());
+    return base::ProcessMetrics::CreateCurrentProcessMetrics();
 #if defined(OS_LINUX) || defined(OS_ANDROID)
   // Just pass ProcessId instead of handle since they are the same in linux and
   // android.
-  return base::WrapUnique(base::ProcessMetrics::CreateProcessMetrics(process));
+  return base::ProcessMetrics::CreateProcessMetrics(process);
 #else
   // Creating process metrics for child processes in mac or windows requires
-  // additional information like ProcessHandle or port provider. This is a non
-  // needed use case.
+  // additional information like ProcessHandle or port provider.
   NOTREACHED();
   return std::unique_ptr<base::ProcessMetrics>();
 #endif  // defined(OS_LINUX) || defined(OS_ANDROID)
 }
 
 }  // namespace
 
 // static
 uint64_t ProcessMetricsMemoryDumpProvider::rss_bytes_for_testing = 0;
 
@@ skipping 122 matching lines @@
 
   pmd->process_totals()->set_resident_set_bytes(rss_bytes);
   pmd->set_has_process_totals();
   pmd->process_totals()->set_peak_resident_set_bytes(peak_rss_bytes);
 
   // Returns true even if other metrics failed, since rss is reported.
   return true;
 }
 
 }  // namespace tracing