Add missing macros includes in media/.

media/cdm/external_clear_key_test_helper.h

 // Copyright 2015 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 MEDIA_CDM_EXTERNAL_CLEAR_KEY_TEST_HELPER_H_
 #define MEDIA_CDM_EXTERNAL_CLEAR_KEY_TEST_HELPER_H_
 
 #include <string>
 
 #include "base/files/file_path.h"
+#include "base/macros.h"
 #include "base/scoped_native_library.h"
 
 namespace media {
 
 // This class loads the library containing External Clear Key. The library is
 // loaded and initialized in the constructor, and unloaded in the destructor.
 class ExternalClearKeyTestHelper {
  public:
   ExternalClearKeyTestHelper();
   ~ExternalClearKeyTestHelper();
@@ skipping 10 matching lines @@
   // Keep a reference to the loaded library.
   base::FilePath library_path_;
   base::ScopedNativeLibrary library_;
 
   DISALLOW_COPY_AND_ASSIGN(ExternalClearKeyTestHelper);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_CDM_EXTERNAL_CLEAR_KEY_TEST_HELPER_H_