Android: Refactor native test setup in a util class.

testing/android/native_test_util.h

+// Copyright (c) 2013 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 TESTING_ANDROID_NATIVE_TEST_UTIL_
+#define TESTING_ANDROID_NATIVE_TEST_UTIL_
+
+#include <stdio.h>
+#include <string>
+#include <vector>
+
+// Helper methods for setting up environment for running gtest tests
+// inside an APK.
+namespace testing {
+namespace native_test_util {
+
+class ScopedMainEntryLogger {
+ public:
+  ScopedMainEntryLogger() {
+    printf(">>ScopedMainEntryLogger\n");
+  }
+
+  ~ScopedMainEntryLogger() {
+    printf("<<ScopedMainEntryLogger\n");
+    fflush(stdout);
+    fflush(stderr);
+  }
+};
+
+// Creates a fifo at the given |fifo_path|.
+void CreateFIFO(const char* fifo_path);
+// Redirects the |stream| to the file provided by |path|.
+void RedirectStream(FILE* stream, const char* path, const char* mode);
+void ParseArgsFromCommandLineFile(
+    const char* path, std::vector<std::string>* args);
+int ArgsToArgv(const std::vector<std::string>& args, std::vector<char*>* argv);
+
+}  // namespace native_test_util
+}  // namespace testing
+
+#endif  // TESTING_ANDROID_NATIVE_TEST_UTIL_