Provide dummy Android UI thread with looper for C++ unit tests

base/test/test_ui_thread_android.h

Index: base/test/test_ui_thread_android.h
diff --git a/base/test/test_ui_thread_android.h b/base/test/test_ui_thread_android.h
new file mode 100644
index 0000000000000000000000000000000000000000..dfecbfeaaab4b46a391d5878e59306519fdbdded
--- /dev/null
+++ b/base/test/test_ui_thread_android.h
@@ -0,0 +1,21 @@
+// Copyright 2015 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_TEST_UI_THREAD_ANDROID_
+#define BASE_TEST_TEST_UI_THREAD_ANDROID_
+
+#include <jni.h>
+
+namespace base {
+
+// Set up a thread as the Chromium UI Thread, and run its looper. This is is
+// intended for C++ unit tests (e.g. the net unit tests) that don't run with the
+// UI thread as their main looper, but test code that, on Android, uses UI
+// thread events, so need a running UI thread.
+void StartTestUiThreadLooper();
+
+bool RegisterTestUiThreadAndroid(JNIEnv* env);
+}  // namespace base
+
+#endif  //  BASE_TEST_TEST_UI_THREAD_ANDROID_