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

chrome/browser/chromeos/drive/file_system/operation_test_base.h

Index: chrome/browser/chromeos/drive/file_system/operation_test_base.h
diff --git a/chrome/browser/chromeos/drive/file_system/operation_test_base.h b/chrome/browser/chromeos/drive/file_system/operation_test_base.h
index a35784e855c32a22516263d0498b11fcdb427111..f02ddd48baa0d9276995d42679304f7bc61dc287 100644
--- a/chrome/browser/chromeos/drive/file_system/operation_test_base.h
+++ b/chrome/browser/chromeos/drive/file_system/operation_test_base.h
@@ -91,7 +91,7 @@ class OperationTestBase : public testing::Test {
   LoggingObserver* observer() { return &observer_; }
   JobScheduler* scheduler() { return scheduler_.get(); }
   base::SequencedTaskRunner* blocking_task_runner() {
-    return blocking_task_runner_;
+    return blocking_task_runner_.get();
   }
   internal::ResourceMetadata* metadata() { return metadata_.get(); }
   FakeFreeDiskSpaceGetter* fake_free_disk_space_getter() {