Remove scoped_refptr::release which is confusing and causes leaks.

content/browser/device_orientation/accelerometer_mac.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/device_orientation/accelerometer_mac.h"
 
 #include <math.h>
 
 #include "base/logging.h"
 #include "content/browser/device_orientation/orientation.h"
@@ skipping 75 matching lines @@
     static double just_less_than_90 = nextafter(90, 0);
     orientation->set_gamma(just_less_than_90);
   }
 
   // At this point, DCHECKing is paranoia. Never hurts.
   DCHECK_GE(orientation->beta(), -180.0);
   DCHECK_LT(orientation->beta(),  180.0);
   DCHECK_GE(orientation->gamma(), -90.0);
   DCHECK_LT(orientation->gamma(),  90.0);
 
-  return orientation.release();
+  orientation->AddRef();
+  return orientation.get();
 }
 
 bool AccelerometerMac::Init() {
   sudden_motion_sensor_.reset(SuddenMotionSensor::Create());
   return sudden_motion_sensor_.get() != NULL;
 }
 
 }  // namespace content