Decouple input_method from BrowserThread (and content/).

chrome/browser/chromeos/input_method/mock_sequenced_task_runner.h

+// 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 CHROME_BROWSER_CHROMEOS_INPUT_METHOD_MOCK_SEQUENCED_TASK_RUNNER_H_
+#define CHROME_BROWSER_CHROMEOS_INPUT_METHOD_MOCK_SEQUENCED_TASK_RUNNER_H_
+
+#include "base/basictypes.h"
+#include "base/sequenced_task_runner.h"
+
+class MockSequencedTaskRunner : public base::SequencedTaskRunner {
+ public:
+  MockSequencedTaskRunner();
+
+  // base::SequencedTaskRunner implementation.
+  virtual bool PostDelayedTask(const tracked_objects::Location& from_here,
+                               const base::Closure& task,
+                               base::TimeDelta delay) OVERRIDE;
+  virtual bool RunsTasksOnCurrentThread() const OVERRIDE;
+  virtual bool PostNonNestableDelayedTask(
+      const tracked_objects::Location& from_here,
+      const base::Closure& task,
+      base::TimeDelta delay) OVERRIDE;
+
+ private:
+  virtual ~MockSequencedTaskRunner();
+  DISALLOW_COPY_AND_ASSIGN(MockSequencedTaskRunner);
+};
+
+#endif  // CHROME_BROWSER_CHROMEOS_INPUT_METHOD_MOCK_SEQUENCED_TASK_RUNNER_H_