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

media/cast/sender/h264_vt_encoder_unittest.cc

Index: media/cast/sender/h264_vt_encoder_unittest.cc
diff --git a/media/cast/sender/h264_vt_encoder_unittest.cc b/media/cast/sender/h264_vt_encoder_unittest.cc
index 49a451d0e453c0ac35fb12f86355f75e9c4fdfb8..4798a216cd8a5600ee6bacead77812972e222ff4 100644
--- a/media/cast/sender/h264_vt_encoder_unittest.cc
+++ b/media/cast/sender/h264_vt_encoder_unittest.cc
@@ -231,9 +231,8 @@ class H264VideoToolboxEncoderTest : public ::testing::Test {
         new base::PowerMonitor(scoped_ptr<TestPowerSource>(power_source_)));
 
     cast_environment_ = new CastEnvironment(
-        scoped_ptr<base::TickClock>(clock_).Pass(),
-        message_loop_.task_runner(), message_loop_.task_runner(),
-        message_loop_.task_runner());
+        scoped_ptr<base::TickClock>(clock_), message_loop_.task_runner(),
+        message_loop_.task_runner(), message_loop_.task_runner());
     encoder_.reset(new H264VideoToolboxEncoder(
         cast_environment_, video_sender_config_,
         base::Bind(&SaveOperationalStatus, &operational_status_)));