Rename ExceptionCode constants to use the names in the spec (2/3)

Source/modules/encryptedmedia/MediaKeySession.cpp

Index: Source/modules/encryptedmedia/MediaKeySession.cpp
diff --git a/Source/modules/encryptedmedia/MediaKeySession.cpp b/Source/modules/encryptedmedia/MediaKeySession.cpp
index f95704a5dd77f8d8f65c2a13140fd6b8e5041056..1a120badecf0c7ac7d6a25215e00dd6f45d41a8b 100644
--- a/Source/modules/encryptedmedia/MediaKeySession.cpp
+++ b/Source/modules/encryptedmedia/MediaKeySession.cpp
@@ -112,10 +112,10 @@ void MediaKeySession::update(Uint8Array* key, ExceptionCode& ec)
 {
     // From <http://dvcs.w3.org/hg/html-media/raw-file/default/encrypted-media/encrypted-media.html#dom-addkey>:
     // The addKey(key) method must run the following steps:
-    // 1. If the first or second argument [sic] is null or an empty array, throw an INVALID_ACCESS_ERR.
+    // 1. If the first or second argument [sic] is null or an empty array, throw an InvalidAccessError.
     // NOTE: the reference to a "second argument" is a spec bug.
     if (!key || !key->length()) {
-        ec = INVALID_ACCESS_ERR;
+        ec = InvalidAccessError;
         return;
     }