MediaRecorder: update to spec (2/3)

third_party/WebKit/Source/modules/mediarecorder/MediaRecorder.idl

Index: third_party/WebKit/Source/modules/mediarecorder/MediaRecorder.idl
diff --git a/third_party/WebKit/Source/modules/mediarecorder/MediaRecorder.idl b/third_party/WebKit/Source/modules/mediarecorder/MediaRecorder.idl
index 2b92f95e497e1899a165223dba9f89df298e5c6e..01b474b0c9264d81856f36b9571c7a93d2e2d23f 100644
--- a/third_party/WebKit/Source/modules/mediarecorder/MediaRecorder.idl
+++ b/third_party/WebKit/Source/modules/mediarecorder/MediaRecorder.idl
@@ -9,9 +9,7 @@ enum RecordingStateEnum { "inactive", "recording", "paused" };
 [
     GarbageCollected,
     ActiveDOMObject,
-    // TODO(mcasas): consider changing |mimeType| to a dictionary with said key, see https://github.com/w3c/mediacapture-record/issues/19
-    // TODO(mcasas): Remove [TreatUndefinedAs], see https://github.com/w3c/mediacapture-record/issues/7
-    Constructor(MediaStream stream, [TreatUndefinedAs=Missing] optional DOMString mimeType),
+    Constructor(MediaStream stream, optional MediaRecorderOptions options),
     ConstructorCallWith=ExecutionContext,
     RaisesException=Constructor,
     RuntimeEnabled=MediaRecorder,
@@ -34,5 +32,5 @@ enum RecordingStateEnum { "inactive", "recording", "paused" };
     [RaisesException] void resume();
     [RaisesException] void requestData();
 
-    static DOMString canRecordMimeType(DOMString mimeType);
+    static boolean isTypeSupported(DOMString type);
 };