Fix printing project on linux.

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
index 63b80208fbdfc7e3ff2eca6cc302e38938bf55aa..d9f6b58f152af30fcebf4e936589be8a0bd33cd9 100644
--- a/printing/run_all_unittests.cc
+++ b/printing/run_all_unittests.cc
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "app/test_suite.h"
+#include "base/test_suite.h"
 
 int main(int argc, char** argv) {
-  return AppTestSuite(argc, argv).Run();
+  return TestSuite(argc, argv).Run();
 }