Add forwarder2

tools/android/forwarder2/thread.h

Index: tools/android/forwarder2/thread.h
diff --git a/tools/android/forwarder2/thread.h b/tools/android/forwarder2/thread.h
new file mode 100644
index 0000000000000000000000000000000000000000..b3ce54a3798be2806b017d377fe00e78f3b21a2b
--- /dev/null
+++ b/tools/android/forwarder2/thread.h
@@ -0,0 +1,34 @@
+// 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 TOOLS_ANDROID_FORWARDER2_THREAD_H_
+#define TOOLS_ANDROID_FORWARDER2_THREAD_H_
+
+#include <pthread.h>
+
+namespace forwarder {
+
+// Helper abstract class to create a new thread and curry the
+// call to the Run() method in an object from the new thread.
+class Thread {
+ public:
+  Thread();
+  virtual ~Thread();
+
+  // Start thread calling Run().
+  void Start();
+  virtual void Join();
+
+ protected:
+  virtual void Run() = 0;
+
+ private:
+  static void* ThreadCallback(void* arg);
+
+  pthread_t thread_;
+};
+
+}  // namespace forwarder
+
+#endif  // TOOLS_ANDROID_FORWARDER2_THREAD_H_