Include chrome/SConscript.unit_tests in Linux build....

chrome/test/unit/run_all_unittests.cc

 // Copyright (c) 2006-2008 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.
 
+#include "build/build_config.h"
+
+#include "base/test_suite.h"
+
+// TODO(port): This is not Windows-specific, but needs to be ported.
+#if defined(OS_WIN)
 #include "chrome/test/unit/chrome_test_suite.h"
+#endif
 
 int main(int argc, char **argv) {
+#if defined(OS_WIN)
+  // TODO(port): This is not Windows-specific, but needs to be ported.
   return ChromeTestSuite(argc, argv).Run();
+#else
+  return TestSuite(argc, argv).Run();
+#endif
 }