Update WebKit idl files after chrome roll

third_party/WebCore/html/MediaKeyError.idl

Index: third_party/WebCore/html/MediaKeyError.idl
diff --git a/third_party/WebCore/html/MediaKeyError.idl b/third_party/WebCore/html/MediaKeyError.idl
index f7279d39c881b1ae971480a32014c9a66e714419..9631551392d6e9232f4fe66bf6804eb02809bc5b 100644
--- a/third_party/WebCore/html/MediaKeyError.idl
+++ b/third_party/WebCore/html/MediaKeyError.idl
@@ -23,11 +23,11 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
  */
 
-[
-    Conditional=ENCRYPTED_MEDIA,
+interface [
+    Conditional=ENCRYPTED_MEDIA|ENCRYPTED_MEDIA_V2,
     V8EnabledAtRuntime=encryptedMedia, 
     ImplementationLacksVTable
-] interface MediaKeyError {
+] MediaKeyError {
     const unsigned short MEDIA_KEYERR_UNKNOWN = 1;
     const unsigned short MEDIA_KEYERR_CLIENT = 2;
     const unsigned short MEDIA_KEYERR_SERVICE = 3;
@@ -35,4 +35,5 @@
     const unsigned short MEDIA_KEYERR_HARDWARECHANGE = 5;
     const unsigned short MEDIA_KEYERR_DOMAIN = 6;
     readonly attribute unsigned short code;
+    [Conditional=ENCRYPTED_MEDIA_V2] readonly attribute unsigned long systemCode;
 };