Reland of "Convert Widevine and Android platform key systems to KeySystemProperties" with fix

media/base/key_system_properties.h

 // Copyright 2013 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_BASE_KEY_SYSTEM_PROPERTIES_H_
 #define MEDIA_BASE_KEY_SYSTEM_PROPERTIES_H_
 
 #include <string>
 
+#include "build/build_config.h"
 #include "media/base/eme_constants.h"
 #include "media/base/key_system_info.h"
 #include "media/base/media_export.h"
 
 namespace media {
 
 // Provides an interface for querying the properties of a registered key system.
 class MEDIA_EXPORT KeySystemProperties {
  public:
   virtual ~KeySystemProperties() {}
@@ skipping 65 matching lines @@
   std::string GetPepperType() const override;
 #endif
 
  private:
   const KeySystemInfo info_;
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_KEY_SYSTEM_PROPERTIES_H_