Use movable types for CallStackProfile(s) to remove copying of data.

components/metrics/call_stack_profile_collector.cc

 // Copyright 2016 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/metrics/call_stack_profile_collector.h"
 
+#include <utility>
+
 #include "base/memory/ptr_util.h"
 #include "components/metrics/call_stack_profile_metrics_provider.h"
 #include "mojo/public/cpp/bindings/interface_request.h"
 #include "mojo/public/cpp/bindings/strong_binding.h"
 
 namespace metrics {
 
 CallStackProfileCollector::CallStackProfileCollector(
     CallStackProfileParams::Process expected_process)
     : expected_process_(expected_process) {}
 
 CallStackProfileCollector::~CallStackProfileCollector() {}
 
 // static
 void CallStackProfileCollector::Create(
     CallStackProfileParams::Process expected_process,
     mojom::CallStackProfileCollectorRequest request) {
   mojo::MakeStrongBinding(
       base::MakeUnique<CallStackProfileCollector>(expected_process),
       std::move(request));
 }
 
 void CallStackProfileCollector::Collect(
     const CallStackProfileParams& params,
     base::TimeTicks start_timestamp,
-    const std::vector<CallStackProfile>& profiles) {
+    std::vector<CallStackProfile> profiles) {
   if (params.process != expected_process_)
     return;
 
-  CallStackProfileMetricsProvider::ReceiveCompletedProfiles(params,
-                                                            start_timestamp,
-                                                            profiles);
+  CallStackProfileMetricsProvider::ReceiveCompletedProfiles(
+      params, start_timestamp, std::move(profiles));
 }
 
 }  // namespace metrics