Fix mojo::shell::Context shutdown.

shell/shell_test_base.h

 // Copyright 2014 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 SHELL_SHELL_TEST_BASE_H_
 #define SHELL_SHELL_TEST_BASE_H_
 
 #include <string>
 
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
 #include "mojo/public/cpp/system/core.h"
 #include "shell/context.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 class GURL;
 
 namespace mojo {
 namespace shell {
 namespace test {
 
 class ShellTestBase : public testing::Test {
  public:
   ShellTestBase();
   ~ShellTestBase() override;
 
   void SetUp() override;
+  void TearDown() override;
 
   // |application_url| should typically be a mojo: URL (the origin will be set
   // to an "appropriate" file: URL).
   // TODO(tim): Should the test base be a ServiceProvider?
   ScopedMessagePipeHandle ConnectToService(const GURL& application_url,
                                            const std::string& service_name);
 
   template <typename Interface>
   void ConnectToService(const GURL& application_url,
                         InterfacePtr<Interface>* ptr) {
@@ skipping 11 matching lines @@
   base::MessageLoop message_loop_;
 
   DISALLOW_COPY_AND_ASSIGN(ShellTestBase);
 };
 
 }  // namespace test
 }  // namespace shell
 }  // namespace mojo
 
 #endif  // SHELL_SHELL_TEST_BASE_H_