Media Capabilities: add MediaDecodingConfiguration.idl and update to Spec

third_party/WebKit/LayoutTests/external/wpt/media-capabilities/idlharness.html

Index: third_party/WebKit/LayoutTests/external/wpt/media-capabilities/idlharness.html
diff --git a/third_party/WebKit/LayoutTests/external/wpt/media-capabilities/idlharness.html b/third_party/WebKit/LayoutTests/external/wpt/media-capabilities/idlharness.html
index 52c555659ecf5c0c770614f1cec4089d193f119e..3efe5a644883f67f3e6600c7b3622231849eea79 100644
--- a/third_party/WebKit/LayoutTests/external/wpt/media-capabilities/idlharness.html
+++ b/third_party/WebKit/LayoutTests/external/wpt/media-capabilities/idlharness.html
@@ -24,13 +24,19 @@ interface WorkerNavigator {
 </pre>
 <pre id='idl'>
 dictionary MediaConfiguration {
-  required MediaConfigurationType type;
-
   VideoConfiguration video;
   AudioConfiguration audio;
 };
 
-enum MediaConfigurationType {
+dictionary MediaDecodingConfiguration : MediaConfiguration {
+  required MediaDecodingType type;
+};
+
+dictionary MediaEncodingConfiguration : MediaConfiguration {
+  required MediaEncodingType type;
+};
+
+enum MediaDecodingType {
   "file",
   "media-source",
 };
@@ -68,7 +74,8 @@ partial interface WorkerNavigator {
 
 [Exposed=(Window, Worker)]
 interface MediaCapabilities {
-  Promise<MediaCapabilitiesInfo> decodingInfo(MediaConfiguration configuration);
+  Promise<MediaCapabilitiesInfo> decodingInfo(MediaDecodingConfiguration configuration);
+  Promise<MediaCapabilitiesInfo> encodingInfo(MediaEncodingConfiguration configuration);
 };
 </pre>
 <script>