base: Remove some unnecessary const scoped_refptr<>&.

base/test/task_runner_test_template.cc

Index: base/test/task_runner_test_template.cc
diff --git a/base/test/task_runner_test_template.cc b/base/test/task_runner_test_template.cc
index efc21936e10c2ef8c77cda2f8612869f47e81827..5983b8a0fd0b5d7439bc19386f80e3ee0fced475 100644
--- a/base/test/task_runner_test_template.cc
+++ b/base/test/task_runner_test_template.cc
@@ -37,9 +37,8 @@ void TaskTracker::WaitForCompletedTasks(int count) {
     task_runs_cv_.Wait();
 }
 
-void ExpectRunsTasksOnCurrentThread(
-    bool expected_value,
-    const scoped_refptr<TaskRunner>& task_runner) {
+void ExpectRunsTasksOnCurrentThread(bool expected_value,
+                                    TaskRunner* task_runner) {
   EXPECT_EQ(expected_value, task_runner->RunsTasksOnCurrentThread());
 }