Introduce ThreadTaskRunnerHandle::OverrideForTesting and TestMockTimeTaskRunner::ScopedContext.

base/threading/post_task_and_reply_impl_unittest.cc

 // Copyright 2016 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 "base/threading/post_task_and_reply_impl.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/test/test_simple_task_runner.h"
-#include "base/threading/sequenced_task_runner_handle.h"
+#include "base/threading/thread_task_runner_handle.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using ::testing::_;
 
 namespace base {
 namespace internal {
 
 namespace {
 
@@ skipping 44 matching lines @@
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MockObject);
 };
 
 }  // namespace
 
 TEST(PostTaskAndReplyImplTest, PostTaskAndReply) {
   scoped_refptr<TestSimpleTaskRunner> post_runner(new TestSimpleTaskRunner);
   scoped_refptr<TestSimpleTaskRunner> reply_runner(new TestSimpleTaskRunner);
-  SequencedTaskRunnerHandle sequenced_task_runner_handle(reply_runner);
+  ThreadTaskRunnerHandle task_runner_handle(reply_runner);
 
   testing::StrictMock<MockObject> mock_object;
   bool delete_flag = false;
 
   EXPECT_TRUE(
       PostTaskAndReplyTaskRunner(post_runner.get())
           .PostTaskAndReply(
               FROM_HERE,
               Bind(&MockObject::Task, Unretained(&mock_object),
                    make_scoped_refptr(new ObjectToDelete(&delete_flag))),
@@ skipping 20 matching lines @@
   testing::Mock::VerifyAndClear(&mock_object);
   EXPECT_TRUE(delete_flag);
 
   // Expect no pending task in |post_runner| and |reply_runner|.
   EXPECT_FALSE(post_runner->HasPendingTask());
   EXPECT_FALSE(reply_runner->HasPendingTask());
 }
 
 }  // namespace internal
 }  // namespace base