Adds option to run browser tests in mash

chrome/test/base/mojo_test_connector.h

Index: chrome/test/base/mojo_test_connector.h
diff --git a/chrome/test/base/mojo_test_connector.h b/chrome/test/base/mojo_test_connector.h
new file mode 100644
index 0000000000000000000000000000000000000000..909a4903d1ceffbba49619e2e180b2afa73b8ad2
--- /dev/null
+++ b/chrome/test/base/mojo_test_connector.h
@@ -0,0 +1,53 @@
+// 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_MOJO_TEST_CONNECTOR_H_
+#define CHROME_TEST_BASE_MOJO_TEST_CONNECTOR_H_
+
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/process/process_handle.h"
+#include "base/test/launcher/test_launcher.h"
+#include "mojo/shell/background/background_shell.h"
+#include "mojo/shell/public/interfaces/shell_client.mojom.h"
+
+namespace base {
+class CommandLine;
+}
+
+namespace content {
+class TestState;
+}
+
+namespace mojo {
+class ShellClient;
+class ShellConnection;
+}
+
+// MojoTestConnector in responsible for providing the necessary wiring for
+// test processes to get a mojo channel passed to them.  To use this class
+// call PrepareForTest() prior to launching each test. It is expected
+// PrepareForTest() is called from content::TestLauncherDelegate::PreRunTest().
+class MojoTestConnector {
+ public:
+  // Switch added to command line of each test.
+  static const char kTestSwitch[];
+
+  MojoTestConnector();
+  ~MojoTestConnector();
+
+  // Initializes the background thread the Shell runs on.
+  mojo::shell::mojom::ShellClientRequest Init();
+
+  scoped_ptr<content::TestState> PrepareForTest(
+      base::CommandLine* command_line,
+      base::TestLauncher::LaunchOptions* test_launch_options);
+
+ private:
+  mojo::shell::BackgroundShell background_shell_;
+
+  DISALLOW_COPY_AND_ASSIGN(MojoTestConnector);
+};
+
+#endif  // CHROME_TEST_BASE_MOJO_TEST_CONNECTOR_H_