Convert Pass()→std::move() for Mac build.

content/browser/device_sensors/ambient_light_mac.cc

Index: content/browser/device_sensors/ambient_light_mac.cc
diff --git a/content/browser/device_sensors/ambient_light_mac.cc b/content/browser/device_sensors/ambient_light_mac.cc
index 187f6a0697d21c93312b079c5448a832f91ff085..6f8d3d99d4c8c730f992b2ca99baade76b4b3dd7 100644
--- a/content/browser/device_sensors/ambient_light_mac.cc
+++ b/content/browser/device_sensors/ambient_light_mac.cc
@@ -6,6 +6,8 @@
 
 #include "content/browser/device_sensors/ambient_light_mac.h"
 
+#include <utility>
+
 #include "base/mac/scoped_cftyperef.h"
 #include "base/mac/scoped_ioobject.h"
 
@@ -23,7 +25,7 @@ enum LmuFunctionIndex {
 // static
 scoped_ptr<AmbientLightSensor> AmbientLightSensor::Create() {
   scoped_ptr<AmbientLightSensor> light_sensor(new AmbientLightSensor);
-  return light_sensor->Init() ? light_sensor.Pass() : nullptr;
+  return light_sensor->Init() ? std::move(light_sensor) : nullptr;
 }
 
 AmbientLightSensor::~AmbientLightSensor() {