Change EME WebIDL to use ArrayBuffer/ArrayBufferView.

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 a83f9e74d05621587c3f4bb19fbac7b549388cfc..53acca5a36d02b05eba7106e5857de2787492c6a 100644
--- a/Source/modules/encryptedmedia/MediaKeys.h
+++ b/Source/modules/encryptedmedia/MediaKeys.h
@@ -52,7 +52,8 @@ public:
 
     const String& keySystem() const { return m_keySystem; }
 
-    ScriptPromise createSession(ScriptState*, const String& initDataType, Uint8Array* initData, const String& sessionType);
+    ScriptPromise createSession(ScriptState*, const String& initDataType, ArrayBuffer* initData, const String& sessionType);
+    ScriptPromise createSession(ScriptState*, const String& initDataType, ArrayBufferView* initData, const String& sessionType);
 
     static bool isTypeSupported(const String& keySystem, const String& contentType);
 
@@ -67,6 +68,8 @@ 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;
 };