Remove web_media_capabilities_decoding_info.h

... from Blink. It is sitting unused in the tree.

In fact, the whole third_party/blink/public/platform/modules/media_capabilities
directory can later be moved down to renderer/platform.

BUG=919392
R=haraken@chromium.org

Change-Id: I41e4c9bf7e7f78153e404175e21b01a629f7b9cd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1786097
Commit-Queue: Antonio Gomes <tonikitoo@igalia.com>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#694273}

third_party/blink/public/BUILD.gn

@@ -135,7 +135,6 @@ source_set("blink_headers") {
     "platform/media/webmediaplayer_delegate.h",
     "platform/modules/indexeddb/web_idb_database_exception.h",
     "platform/modules/media_capabilities/web_audio_configuration.h",
-    "platform/modules/media_capabilities/web_media_capabilities_decoding_info.h",
     "platform/modules/media_capabilities/web_media_capabilities_info.h",
     "platform/modules/media_capabilities/web_media_capabilities_key_system_configuration.h",
     "platform/modules/media_capabilities/web_media_configuration.h",

third_party/blink/public/platform/modules/media_capabilities/web_media_capabilities_decoding_info.h

-// Copyright 2017 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 THIRD_PARTY_BLINK_PUBLIC_PLATFORM_MODULES_MEDIA_CAPABILITIES_WEB_MEDIA_CAPABILITIES_DECODING_INFO_H_
-#define THIRD_PARTY_BLINK_PUBLIC_PLATFORM_MODULES_MEDIA_CAPABILITIES_WEB_MEDIA_CAPABILITIES_DECODING_INFO_H_
-
-#include "third_party/blink/public/platform/modules/media_capabilities/web_media_capabilities_info.h"
-#include "third_party/blink/public/platform/web_content_decryption_module_access.h"
-
-namespace blink {
-
-// Represents a MediaCapabilitiesDecodingInfo dictionary to be used outside of
-// Blink. This is set by consumers and sent back to Blink.
-struct WebMediaCapabilitiesDecodingInfo : WebMediaCapabilitiesInfo {
-  std::unique_ptr<WebContentDecryptionModuleAccess>
-      content_decryption_module_access;
-};
-
-}  // namespace blink
-
-#endif  // THIRD_PARTY_BLINK_PUBLIC_PLATFORM_MODULES_MEDIA_CAPABILITIES_WEB_MEDIA_CAPABILITIES_DECODING_INFO_H_