Add HTMLMediaElement.waitingforkey event

Source/modules/encryptedmedia/HTMLMediaElementEncryptedMedia.h

Index: Source/modules/encryptedmedia/HTMLMediaElementEncryptedMedia.h
diff --git a/Source/modules/encryptedmedia/HTMLMediaElementEncryptedMedia.h b/Source/modules/encryptedmedia/HTMLMediaElementEncryptedMedia.h
index 55fcd85339ebb0d8c4342934b3a45ce2f9d2cb20..7e5b55c728ffa5b5e8515a7435bea0d70e474775 100644
--- a/Source/modules/encryptedmedia/HTMLMediaElementEncryptedMedia.h
+++ b/Source/modules/encryptedmedia/HTMLMediaElementEncryptedMedia.h
@@ -45,6 +45,8 @@ public:
     static void keyError(HTMLMediaElement&, const String& keySystem, const String& sessionId, WebMediaPlayerClient::MediaKeyErrorCode, unsigned short systemCode);
     static void keyMessage(HTMLMediaElement&, const String& keySystem, const String& sessionId, const unsigned char* message, unsigned messageLength, const WebURL& defaultURL);
     static void encrypted(HTMLMediaElement&, const String& initDataType, const unsigned char* initData, unsigned initDataLength);
+    static void didBlockPlaybackWaitingForKey(HTMLMediaElement&);
+    static void didResumePlaybackBlockedForKey(HTMLMediaElement&);
     static void playerDestroyed(HTMLMediaElement&);
     static WebContentDecryptionModule* contentDecryptionModule(HTMLMediaElement&);
 
@@ -79,6 +81,8 @@ private:
 
     EmeMode m_emeMode;
 
+    bool m_isWaitingForKey;
+
     PersistentWillBeMember<MediaKeys> m_mediaKeys;
 };