Use std::move() instead of .Pass() in remoting/host

remoting/host/native_messaging/native_messaging_pipe.cc

Index: remoting/host/native_messaging/native_messaging_pipe.cc
diff --git a/remoting/host/native_messaging/native_messaging_pipe.cc b/remoting/host/native_messaging/native_messaging_pipe.cc
index 58fc53245608aa71530bc9e28215e9144d18b286..553adaa2f00f202eb4d135bb9ff2d6a4f1bf0613 100644
--- a/remoting/host/native_messaging/native_messaging_pipe.cc
+++ b/remoting/host/native_messaging/native_messaging_pipe.cc
@@ -20,8 +20,8 @@ NativeMessagingPipe::~NativeMessagingPipe() {
 void NativeMessagingPipe::Start(
     scoped_ptr<extensions::NativeMessageHost> host,
     scoped_ptr<extensions::NativeMessagingChannel> channel) {
-  host_ = host.Pass();
-  channel_ = channel.Pass();
+  host_ = std::move(host);
+  channel_ = std::move(channel);
   channel_->Start(this);
 }
 
@@ -39,7 +39,7 @@ void NativeMessagingPipe::OnDisconnect() {
 void NativeMessagingPipe::PostMessageFromNativeHost(
     const std::string& message) {
   scoped_ptr<base::Value> json = base::JSONReader::Read(message);
-  channel_->SendMessage(json.Pass());
+  channel_->SendMessage(std::move(json));
 }
 
 void NativeMessagingPipe::CloseChannel(const std::string& error_message) {