Convert Pass()→std::move() in //components/[n-z]*

components/proximity_auth/cryptauth/mock_cryptauth_client.cc

Index: components/proximity_auth/cryptauth/mock_cryptauth_client.cc
diff --git a/components/proximity_auth/cryptauth/mock_cryptauth_client.cc b/components/proximity_auth/cryptauth/mock_cryptauth_client.cc
index 05f9ac6c33befe86c2521478a02195274507b676..5086dd4c5410fe6bea16246c1cde5caca4109a3c 100644
--- a/components/proximity_auth/cryptauth/mock_cryptauth_client.cc
+++ b/components/proximity_auth/cryptauth/mock_cryptauth_client.cc
@@ -2,9 +2,12 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "base/callback.h"
 #include "components/proximity_auth/cryptauth/mock_cryptauth_client.h"
 
+#include <utility>
+
+#include "base/callback.h"
+
 namespace proximity_auth {
 
 MockCryptAuthClient::MockCryptAuthClient() {
@@ -29,7 +32,7 @@ scoped_ptr<CryptAuthClient> MockCryptAuthClientFactory::CreateInstance() {
 
   FOR_EACH_OBSERVER(Observer, observer_list_,
                     OnCryptAuthClientCreated(client.get()));
-  return client.Pass();
+  return std::move(client);
 }
 
 void MockCryptAuthClientFactory::AddObserver(Observer* observer) {