Setup ash_unittests --mash

ash/test/ash_test_suite.cc

 // Copyright (c) 2012 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 "ash/test/ash_test_suite.h"
 
 #include "ash/public/cpp/config.h"
 #include "ash/test/ash_test_environment.h"
 #include "ash/test/ash_test_helper.h"
 #include "base/command_line.h"
@@ skipping 43 matching lines @@
         ash_test_resources_100, ui::SCALE_FACTOR_100P);
   }
   if (ui::ResourceBundle::IsScaleFactorSupported(ui::SCALE_FACTOR_200P)) {
     base::FilePath ash_test_resources_200 =
         path.Append(FILE_PATH_LITERAL("ash_test_resources_200_percent.pak"));
     ui::ResourceBundle::GetSharedInstance().AddDataPackFromPath(
         ash_test_resources_200, ui::SCALE_FACTOR_200P);
   }
 
   const bool is_mus = base::CommandLine::ForCurrentProcess()->HasSwitch("mus");
-  ash::test::AshTestHelper::config_ = is_mus ? Config::MUS : Config::CLASSIC;
+  const bool is_mash =
+      base::CommandLine::ForCurrentProcess()->HasSwitch("mash");
+  ash::test::AshTestHelper::config_ =
+      is_mus ? Config::MUS : is_mash ? Config::MASH : Config::CLASSIC;
 
   base::DiscardableMemoryAllocator::SetInstance(&discardable_memory_allocator_);
-  env_ = aura::Env::CreateInstance(is_mus ? aura::Env::Mode::MUS
-                                          : aura::Env::Mode::LOCAL);
+  env_ = aura::Env::CreateInstance(is_mus || is_mash ? aura::Env::Mode::MUS
+                                                     : aura::Env::Mode::LOCAL);
 
-  if (is_mus) {
+  if (is_mus || is_mash) {
     context_factory_ = base::MakeUnique<ui::FakeContextFactory>();
     env_->set_context_factory(context_factory_.get());
     env_->set_context_factory_private(nullptr);
   }
 }
 
 void AshTestSuite::Shutdown() {
   env_.reset();
   ui::ResourceBundle::CleanupSharedInstance();
   base::TestSuite::Shutdown();
 }
 
 }  // namespace test
 }  // namespace ash