base: Use std::move() instead of Pass() for real movable types.

base/process/process_metrics.cc

 // Copyright 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 <utility>
+
 #include "base/logging.h"
 #include "base/values.h"
 
 namespace base {
 
 SystemMetrics::SystemMetrics() {
   committed_memory_ = 0;
 }
 
 SystemMetrics SystemMetrics::Sample() {
@@ skipping 16 matching lines @@
 
   res->SetInteger("committed_memory", static_cast<int>(committed_memory_));
 #if defined(OS_LINUX) || defined(OS_ANDROID)
   res->Set("meminfo", memory_info_.ToValue());
   res->Set("diskinfo", disk_info_.ToValue());
 #endif
 #if defined(OS_CHROMEOS)
   res->Set("swapinfo", swap_info_.ToValue());
 #endif
 
-  return res.Pass();
+  return std::move(res);
 }
 
 ProcessMetrics* ProcessMetrics::CreateCurrentProcessMetrics() {
 #if !defined(OS_MACOSX) || defined(OS_IOS)
   return CreateProcessMetrics(base::GetCurrentProcessHandle());
 #else
   return CreateProcessMetrics(base::GetCurrentProcessHandle(), nullptr);
 #endif  // !defined(OS_MACOSX) || defined(OS_IOS)
 }
 
@@ skipping 32 matching lines @@
   return (wakeups_delta_for_ms + time_delta / 2) / time_delta;
 }
 #else
 int ProcessMetrics::GetIdleWakeupsPerSecond() {
   NOTIMPLEMENTED();  // http://crbug.com/120488
   return 0;
 }
 #endif  // defined(OS_MACOSX) || defined(OS_LINUX)
 
 }  // namespace base