Convert MediaKeyStatusMap to iterable<BufferSource,MediaKeyStatus>

third_party/WebKit/Source/modules/encryptedmedia/MediaKeyStatusMap.idl

Index: third_party/WebKit/Source/modules/encryptedmedia/MediaKeyStatusMap.idl
diff --git a/third_party/WebKit/Source/modules/encryptedmedia/MediaKeyStatusMap.idl b/third_party/WebKit/Source/modules/encryptedmedia/MediaKeyStatusMap.idl
index 066dd729c56823025cb1e3482d60b097177c249e..f6f363fb09ed614e63aedbbfb92a13050c648b5b 100644
--- a/third_party/WebKit/Source/modules/encryptedmedia/MediaKeyStatusMap.idl
+++ b/third_party/WebKit/Source/modules/encryptedmedia/MediaKeyStatusMap.idl
@@ -14,8 +14,9 @@ enum MediaKeyStatus {
     "internal-error"
 };
 
-[
-] interface MediaKeyStatusMap {
+interface MediaKeyStatusMap {
+    iterable <BufferSource, MediaKeyStatus>;

[ddorwin, 2016/06/14 20:56:05]

Is this not readonly like the maplike was? The spec doesn't have this, but maybe
it should.

[jrummell, 2016/06/14 22:24:21]

According to https://heycam.github.io/webidl/#idl-iterable, readonly is not
allowed with iterable<>. And none of the existing IDL files specify readonly
with iterable<>.

[ddorwin, 2016/06/14 22:56:40]

Acknowledged. Thanks for checking.

     readonly attribute unsigned long size;
-    readonly maplike <BufferSource, MediaKeyStatus>;
+    boolean has(BufferSource keyId);
+    [CallWith=ScriptState] any get(BufferSource keyId);
 };