Reland: mus: Add views_mus_interactive_ui_tests target

ui/views/run_all_unittests.h

 // 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.
 
 #ifndef UI_VIEWS_RUN_ALL_UNITTESTS_H_
 #define UI_VIEWS_RUN_ALL_UNITTESTS_H_
 
 #include "base/callback_forward.h"
 #include "base/test/test_suite.h"
 
 #if defined(USE_AURA)
 #include <memory>
 #endif
 
 namespace aura {
 class Env;
 }
 
 namespace views {
 
+// TODO(jamescook): Rename this to ViewsTestSuite and rename the file to match.
 class ViewTestSuite : public base::TestSuite {
  public:
   ViewTestSuite(int argc, char** argv);
   ~ViewTestSuite() override;
 
   int RunTests();
+  int RunTestsSerially();
 
  protected:
   // base::TestSuite:
   void Initialize() override;
   void Shutdown() override;
 
  private:
 #if defined(USE_AURA)
   std::unique_ptr<aura::Env> env_;
 #endif
   int argc_;
   char** argv_;
 
   DISALLOW_COPY_AND_ASSIGN(ViewTestSuite);
 };
 
 }  // namespace
 
 #endif  // UI_VIEWS_RUN_ALL_UNITTESTS_H_