[webcrypto] Allow both ArrayBuffer and ArrayBufferView as inputs to crypto.subtle methods.

Source/wtf/Forward.h

Index: Source/wtf/Forward.h
diff --git a/Source/wtf/Forward.h b/Source/wtf/Forward.h
index e28448ab3187b1112a5aaad9b74ac214ec6cdd4f..13b96c848257752aa805faa3cfcaf2c883968d41 100644
--- a/Source/wtf/Forward.h
+++ b/Source/wtf/Forward.h
@@ -33,6 +33,7 @@ namespace WTF {
 
     class ArrayBuffer;
     class ArrayBufferView;
+    class ArrayBytes;
     class AtomicString;
     class CString;
     class Float32Array;
@@ -61,6 +62,7 @@ using WTF::Vector;
 
 using WTF::ArrayBuffer;
 using WTF::ArrayBufferView;
+using WTF::ArrayBytes;
 using WTF::AtomicString;
 using WTF::CString;
 using WTF::Float32Array;