Adds option to run browser tests in mash

chrome/test/base/mash_browser_tests_main.h

Index: chrome/test/base/mash_browser_tests_main.h
diff --git a/chrome/test/base/mash_browser_tests_main.h b/chrome/test/base/mash_browser_tests_main.h
new file mode 100644
index 0000000000000000000000000000000000000000..39583eda0a57f5bddd5b3c26674f0a8b98dbec21
--- /dev/null
+++ b/chrome/test/base/mash_browser_tests_main.h
@@ -0,0 +1,12 @@
+// Copyright 2016 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_TEST_BASE_MASH_BROWSER_TESTS_MAIN_H_
+#define CHROME_TEST_BASE_MASH_BROWSER_TESTS_MAIN_H_
+
+// Return true if mash browser tests were run, false otherwise. If the tests
+// were run |exit_code| is set appropriately.
+bool RunMashBrowserTests(int argc, char** argv, int* exit_code);
+
+#endif  // CHROME_TEST_BASE_MASH_BROWSER_TESTS_MAIN_H_