Update CrOS to use scoped_refptr<T>::get() rather than implicit "operator T*"

chrome/browser/chromeos/camera_detector.cc

Index: chrome/browser/chromeos/camera_detector.cc
diff --git a/chrome/browser/chromeos/camera_detector.cc b/chrome/browser/chromeos/camera_detector.cc
index 97378841a5de09f06f6d37ce2be6eec98ed93245..f7906679083d982f20b404a66b3c0f2e8a91c198 100644
--- a/chrome/browser/chromeos/camera_detector.cc
+++ b/chrome/browser/chromeos/camera_detector.cc
@@ -48,7 +48,7 @@ void CameraDetector::StartPresenceCheck(const base::Closure& callback) {
   presence_check_in_progress_ = true;
   base::PostTaskAndReplyWithResult(
       BrowserThread::GetBlockingPool()->GetTaskRunnerWithShutdownBehavior(
-          base::SequencedWorkerPool::SKIP_ON_SHUTDOWN),
+          base::SequencedWorkerPool::SKIP_ON_SHUTDOWN).get(),
       FROM_HERE,
       base::Bind(&CameraDetector::CheckPresence),
       base::Bind(&CameraDetector::OnPresenceCheckDone, callback));