Implement MediaKeySession.generateRequest()

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 d7f669d91f4c269e97c005999e7981e6ced2629c..e31233128d3703d29eff9cb56a8b688d27a658b0 100644
--- a/Source/modules/encryptedmedia/MediaKeys.h
+++ b/Source/modules/encryptedmedia/MediaKeys.h
@@ -37,6 +37,7 @@ namespace blink {
 class ExceptionState;
 class ExecutionContext;
 class HTMLMediaElement;
+class MediaKeySession;
 class ScriptState;
 class WebContentDecryptionModule;
 
@@ -50,8 +51,7 @@ public:
 
     const String& keySystem() const { return m_keySystem; }
 
-    ScriptPromise createSession(ScriptState*, const String& initDataType, ArrayBuffer* initData, const String& sessionType);
-    ScriptPromise createSession(ScriptState*, const String& initDataType, ArrayBufferView* initData, const String& sessionType);
+    MediaKeySession* createSession(ScriptState*, const String& sessionType);
 
     static bool isTypeSupported(const String& keySystem, const String& contentType);
 
@@ -66,8 +66,6 @@ private:
     friend class MediaKeysInitializer;
     MediaKeys(ExecutionContext*, const String& keySystem, PassOwnPtr<blink::WebContentDecryptionModule>);
 
-    ScriptPromise createSessionInternal(ScriptState*, const String& initDataType, PassRefPtr<ArrayBuffer> initData, const String& sessionType);
-
     const String m_keySystem;
     OwnPtr<blink::WebContentDecryptionModule> m_cdm;
 };