Add initial prototype for the GN meta-buildsystem.

tools/gn/secondary/testing/BUILD.gn

Index: tools/gn/secondary/testing/BUILD.gn
diff --git a/tools/gn/secondary/testing/BUILD.gn b/tools/gn/secondary/testing/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..b54cebabd25ba9d6e6412ac365e0f4a1e2eddb51
--- /dev/null
+++ b/tools/gn/secondary/testing/BUILD.gn
@@ -0,0 +1,44 @@
+# 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.
+
+static_library("gtest") {
+  sources = [
+    "gtest/include/gtest/gtest-death-test.h",
+    "gtest/include/gtest/gtest-message.h",
+    "gtest/include/gtest/gtest-param-test.h",
+    "gtest/include/gtest/gtest-printers.h",
+    "gtest/include/gtest/gtest-spi.h",
+    "gtest/include/gtest/gtest-test-part.h",
+    "gtest/include/gtest/gtest-typed-test.h",
+    "gtest/include/gtest/gtest.h",
+    "gtest/include/gtest/gtest_pred_impl.h",
+    "gtest/include/gtest/internal/gtest-death-test-internal.h",
+    "gtest/include/gtest/internal/gtest-filepath.h",
+    "gtest/include/gtest/internal/gtest-internal.h",
+    "gtest/include/gtest/internal/gtest-linked_ptr.h",
+    "gtest/include/gtest/internal/gtest-param-util-generated.h",
+    "gtest/include/gtest/internal/gtest-param-util.h",
+    "gtest/include/gtest/internal/gtest-port.h",
+    "gtest/include/gtest/internal/gtest-string.h",
+    "gtest/include/gtest/internal/gtest-tuple.h",
+    "gtest/include/gtest/internal/gtest-type-util.h",
+    #"gtest/src/gtest-all.cc",  # Not needed by our build.
+    "gtest/src/gtest-death-test.cc",
+    "gtest/src/gtest-filepath.cc",
+    "gtest/src/gtest-internal-inl.h",
+    "gtest/src/gtest-port.cc",
+    "gtest/src/gtest-printers.cc",
+    "gtest/src/gtest-test-part.cc",
+    "gtest/src/gtest-typed-test.cc",
+    "gtest/src/gtest.cc",
+    "multiprocess_func_list.cc",
+    "multiprocess_func_list.h",
+    "platform_test.h",
+  ]
+
+}
+
+static_library("gmock") {
+
+}