Make chromeos CUPS printing code namespaces consistent.

chromeos/printing/printer_translator_unittest.cc

 // Copyright 2016 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 <utility>
 
 #include "base/memory/ptr_util.h"
 #include "base/test/values_test_util.h"
 #include "base/time/time.h"
 #include "base/values.h"
 #include "chromeos/printing/printer_configuration.h"
 #include "chromeos/printing/printer_translator.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace chromeos {
-namespace printing {
 
 // Printer test data
 const char kHash[] = "ABCDEF123456";
 const char kName[] = "Chrome Super Printer";
 const char kDescription[] = "first star on the left";
 const char kUri[] = "ipp://printy.domain.co:555/ipp/print";
 const char kUUID[] = "UUID-UUID-UUID";
 
 const char kMake[] = "Chrome";
 const char kModel[] = "Inktastic Laser Magic";
@@ skipping 127 matching lines @@
   preference.SetString("ppd_resource.effective_model", kEffectiveMakeAndModel);
 
   std::unique_ptr<Printer> printer =
       RecommendedPrinterToPrinter(preference, kTimestamp);
   EXPECT_TRUE(printer);
 
   EXPECT_EQ(kMake, printer->manufacturer());
   EXPECT_EQ(kMake, printer->make_and_model());
 }
 
-}  // namespace printing
 }  // namespace chromeos