Revert of mojo: make libmojo_public_test_support a static library.

mojo/public/c/test_support/test_support_export.h

Index: mojo/public/c/test_support/test_support_export.h
diff --git a/mojo/public/c/test_support/test_support_export.h b/mojo/public/c/test_support/test_support_export.h
new file mode 100644
index 0000000000000000000000000000000000000000..e22a9e30144197d7bab029681aa72a351c14f283
--- /dev/null
+++ b/mojo/public/c/test_support/test_support_export.h
@@ -0,0 +1,26 @@
+// Copyright 2014 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 MOJO_PUBLIC_C_TEST_SUPPORT_TEST_SUPPORT_EXPORT_H_
+#define MOJO_PUBLIC_C_TEST_SUPPORT_TEST_SUPPORT_EXPORT_H_
+
+#if defined(WIN32)
+
+#if defined(MOJO_TEST_SUPPORT_IMPLEMENTATION)
+#define MOJO_TEST_SUPPORT_EXPORT __declspec(dllexport)
+#else
+#define MOJO_TEST_SUPPORT_EXPORT __declspec(dllimport)
+#endif
+
+#else  // !defined(WIN32)
+
+#if defined(MOJO_TEST_SUPPORT_IMPLEMENTATION)
+#define MOJO_TEST_SUPPORT_EXPORT __attribute__((visibility("default")))
+#else
+#define MOJO_TEST_SUPPORT_EXPORT
+#endif
+
+#endif  // defined(WIN32)
+
+#endif  // MOJO_PUBLIC_C_TEST_SUPPORT_TEST_SUPPORT_EXPORT_H_