Schedule session initialization in MediaKeys.

Source/modules/encryptedmedia/MediaKeys.h

Index: Source/modules/encryptedmedia/MediaKeys.h
diff --git a/Source/modules/encryptedmedia/MediaKeys.h b/Source/modules/encryptedmedia/MediaKeys.h
index 96700140ec3bbd2bdeaa77ee6718f4aa8926d41d..fdaaa1de6de06f1865af187b11967a4827a4f5a2 100644
--- a/Source/modules/encryptedmedia/MediaKeys.h
+++ b/Source/modules/encryptedmedia/MediaKeys.h
@@ -28,6 +28,9 @@
 
 #include "bindings/v8/ScriptWrappable.h"
 #include "core/events/EventTarget.h"
+#include "modules/encryptedmedia/MediaKeySession.h"
+#include "platform/Timer.h"
+#include "wtf/Deque.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
@@ -42,7 +45,6 @@ class WebContentDecryptionModule;
 namespace WebCore {
 
 class ContentDecryptionModule;
-class MediaKeySession;
 class HTMLMediaElement;
 class ExceptionState;
 
@@ -65,12 +67,26 @@ public:
 
 protected:
     MediaKeys(const String& keySystem, PassOwnPtr<ContentDecryptionModule>);
+    void initializeNewSessionTimerFired(Timer<MediaKeys>*);
 
     Vector<RefPtr<MediaKeySession> > m_sessions;
 
     HTMLMediaElement* m_mediaElement;
     const String m_keySystem;
     OwnPtr<ContentDecryptionModule> m_cdm;
+
+    // FIXME: Check whether |initData| can be changed by JS. Maybe we should not pass it as a pointer.
+    struct InitializeNewSessionData {
+        InitializeNewSessionData(PassRefPtr<MediaKeySession> session, const String& mimeType, PassRefPtr<Uint8Array> initData)
+            : session(session)
+            , mimeType(mimeType)
+            , initData(initData) { }
+        RefPtr<MediaKeySession> session;
+        String mimeType;
+        RefPtr<Uint8Array> initData;
+    };
+    Deque<InitializeNewSessionData> m_pendingInitializeNewSessionData;
+    Timer<MediaKeys> m_initializeNewSessionTimer;
 };
 
 }