Convert //content/browser from scoped_ptr to std::unique_ptr

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 6f8d3d99d4c8c730f992b2ca99baade76b4b3dd7..c6606791bd35ef399d186bc46e84c336f61f51a4 100644
--- a/content/browser/device_sensors/ambient_light_mac.cc
+++ b/content/browser/device_sensors/ambient_light_mac.cc
@@ -23,8 +23,8 @@ enum LmuFunctionIndex {
 }  // namespace
 
 // static
-scoped_ptr<AmbientLightSensor> AmbientLightSensor::Create() {
-  scoped_ptr<AmbientLightSensor> light_sensor(new AmbientLightSensor);
+std::unique_ptr<AmbientLightSensor> AmbientLightSensor::Create() {
+  std::unique_ptr<AmbientLightSensor> light_sensor(new AmbientLightSensor);
   return light_sensor->Init() ? std::move(light_sensor) : nullptr;
 }