Revert of Establish MojoChildConnection from BrowserChildProcessHostImpl

content/public/test/test_mojo_shell_context.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 CONTENT_PUBLIC_TEST_TEST_MOJO_SHELL_CONTEXT_H_
-#define CONTENT_PUBLIC_TEST_TEST_MOJO_SHELL_CONTEXT_H_
-
-#include <memory>
-
-#include "base/macros.h"
-
-namespace content {
-
-class MojoShellContext;
-
-// Helper class to expose the internal content::MojoShellContext type to unit
-// tests which might need to construct one.
-class TestMojoShellContext {
- public:
-  TestMojoShellContext();
-  ~TestMojoShellContext();
-
- private:
-  std::unique_ptr<MojoShellContext> context_;
-
-  DISALLOW_COPY_AND_ASSIGN(TestMojoShellContext);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_PUBLIC_TEST_TEST_MOJO_SHELL_CONTEXT_H_