Convert most run_all_unittests.cc files to use new unit test launcher.

printing/run_all_unittests.cc

Index: printing/run_all_unittests.cc
diff --git a/printing/run_all_unittests.cc b/printing/run_all_unittests.cc
deleted file mode 100644
index b715a328b99286174ddecba83883a432fc37ff9d..0000000000000000000000000000000000000000
--- a/printing/run_all_unittests.cc
+++ /dev/null
@@ -1,9 +0,0 @@
-// 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 "base/test/test_suite.h"
-
-int main(int argc, char** argv) {
-  return base::TestSuite(argc, argv).Run();
-}