Update MediaKeySession method names to latest EME spec.

Source/modules/encryptedmedia/MediaKeySession.h

Index: Source/modules/encryptedmedia/MediaKeySession.h
diff --git a/Source/modules/encryptedmedia/MediaKeySession.h b/Source/modules/encryptedmedia/MediaKeySession.h
index 26ad01f7e48ad90b2b40f43e70996b7fc0e44695..e21fd20ed1278378e0cb19125631103c6908a164 100644
--- a/Source/modules/encryptedmedia/MediaKeySession.h
+++ b/Source/modules/encryptedmedia/MediaKeySession.h
@@ -64,9 +64,9 @@ public:
     void setError(MediaKeyError*);
     MediaKeyError* error() { return m_error.get(); }
 
-    void generateKeyRequest(const String& mimeType, Uint8Array* initData);
+    void initialize(const String& mimeType, Uint8Array* initData);
     void update(Uint8Array* key, ExceptionState&);
-    void close();
+    void release();
 
     void enqueueEvent(PassRefPtr<Event>);
 
@@ -79,7 +79,7 @@ public:
 
 private:
     MediaKeySession(ExecutionContext*, ContentDecryptionModule*, MediaKeys*);
-    void keyRequestTimerFired(Timer<MediaKeySession>*);
+    void initializeTimerFired(Timer<MediaKeySession>*);
     void addKeyTimerFired(Timer<MediaKeySession>*);
 
     // ContentDecryptionModuleSessionClient
@@ -94,13 +94,9 @@ private:
     // Used to remove the reference from the parent MediaKeys when close()'d.
     MediaKeys* m_keys;
 
-    struct PendingKeyRequest {
-        PendingKeyRequest(const String& mimeType, Uint8Array* initData) : mimeType(mimeType), initData(initData) { }
-        String mimeType;
-        RefPtr<Uint8Array> initData;
-    };
-    Deque<PendingKeyRequest> m_pendingKeyRequests;
-    Timer<MediaKeySession> m_keyRequestTimer;
+    String m_pendingMimeType;
+    RefPtr<Uint8Array> m_pendingInitData;
+    Timer<MediaKeySession> m_initializeTimer;
 
     Deque<RefPtr<Uint8Array> > m_pendingKeys;
     Timer<MediaKeySession> m_addKeyTimer;