Revert of base: Make it possible to replace the MessageLoop's task runner

base/message_loop/message_loop_unittest.cc

Index: base/message_loop/message_loop_unittest.cc
diff --git a/base/message_loop/message_loop_unittest.cc b/base/message_loop/message_loop_unittest.cc
index 9c1701756882febefde91d667e3b38312da8cb11..48c82c4792b51a5e0d67e9ca7737bd24a885e4bb 100644
--- a/base/message_loop/message_loop_unittest.cc
+++ b/base/message_loop/message_loop_unittest.cc
@@ -15,7 +15,6 @@
 #include "base/posix/eintr_wrapper.h"
 #include "base/run_loop.h"
 #include "base/synchronization/waitable_event.h"
-#include "base/test/test_simple_task_runner.h"
 #include "base/thread_task_runner_handle.h"
 #include "base/threading/platform_thread.h"
 #include "base/threading/thread.h"
@@ -1012,26 +1011,4 @@
 }
 #endif  // defined(OS_WIN)
 
-TEST(MessageLoopTest, SetTaskRunner) {
-  MessageLoop loop;
-  scoped_refptr<SingleThreadTaskRunner> new_runner(new TestSimpleTaskRunner());
-
-  loop.SetTaskRunner(new_runner);
-  EXPECT_EQ(new_runner, loop.task_runner());
-  EXPECT_EQ(new_runner, ThreadTaskRunnerHandle::Get());
-}
-
-TEST(MessageLoopTest, OriginalRunnerWorks) {
-  MessageLoop loop;
-  scoped_refptr<SingleThreadTaskRunner> new_runner(new TestSimpleTaskRunner());
-  scoped_refptr<SingleThreadTaskRunner> original_runner(loop.task_runner());
-  loop.SetTaskRunner(new_runner);
-
-  scoped_refptr<Foo> foo(new Foo());
-  original_runner->PostTask(FROM_HERE,
-                            Bind(&Foo::Test1ConstRef, foo.get(), "a"));
-  loop.RunUntilIdle();
-  EXPECT_EQ(1, foo->test_count());
-}
-
 }  // namespace base