Convert Pass()→std::move() for CrOS extension code.

extensions/browser/api/webcam_private/visca_webcam.cc

Index: extensions/browser/api/webcam_private/visca_webcam.cc
diff --git a/extensions/browser/api/webcam_private/visca_webcam.cc b/extensions/browser/api/webcam_private/visca_webcam.cc
index 08776245cee6494e472cd91ed7ff8ad393d3fd77..18c847b7d9f9aea68eaf34162044702218adad7d 100644
--- a/extensions/browser/api/webcam_private/visca_webcam.cc
+++ b/extensions/browser/api/webcam_private/visca_webcam.cc
@@ -6,6 +6,7 @@
 
 #include <stddef.h>
 #include <stdint.h>
+#include <utility>
 
 #include "base/bind.h"
 #include "base/macros.h"
@@ -489,7 +490,7 @@ void ViscaWebcam::Reset(bool pan,
 
 void ViscaWebcam::OpenForTesting(
     scoped_ptr<SerialConnection> serial_connection) {
-  serial_connection_ = serial_connection.Pass();
+  serial_connection_ = std::move(serial_connection);
 }
 
 SerialConnection* ViscaWebcam::GetSerialConnectionForTesting() {