Snap for 7478028 from 33a56a4450406ed97f7289fe0b6a0a20482f0a01 to mainline-documentsui-releaseandroid-mainline-12.0.0_r26android-mainline-12.0.0_r2aml_doc_310851020android12-mainline-documentsui-release

Change-Id: Ie15f13b179f0ad841e4dfd95fcfdce5f01a17f29

1 files changed, 39 insertions, 0 deletions

diff --git a/base/test/null_task_runner.h b/base/test/null_task_runner.h
new file mode 100644
index 0000000000..c11ab6b0c6
--- /dev/null
+++ b/base/test/null_task_runner.h
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 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.
+
+#ifndef BASE_TEST_NULL_TASK_RUNNER_H_
+#define BASE_TEST_NULL_TASK_RUNNER_H_
+
+#include "base/callback.h"
+#include "base/compiler_specific.h"
+#include "base/macros.h"
+#include "base/single_thread_task_runner.h"
+
+namespace base {
+
+// Helper class for tests that need to provide an implementation of a
+// *TaskRunner class but don't actually care about tasks being run.
+
+class NullTaskRunner : public base::SingleThreadTaskRunner {
+ public:
+  NullTaskRunner();
+
+  bool PostDelayedTask(const Location& from_here,
+                       base::OnceClosure task,
+                       base::TimeDelta delay) override;
+  bool PostNonNestableDelayedTask(const Location& from_here,
+                                  base::OnceClosure task,
+                                  base::TimeDelta delay) override;
+  // Always returns true to avoid triggering DCHECKs.
+  bool RunsTasksInCurrentSequence() const override;
+
+ protected:
+  ~NullTaskRunner() override;
+
+  DISALLOW_COPY_AND_ASSIGN(NullTaskRunner);
+};
+
+}  // namespace base
+
+#endif  // BASE_TEST_NULL_TASK_RUNNER_H_