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

Source/modules/mediasource/MediaSource.cpp

Index: Source/modules/mediasource/MediaSource.cpp
diff --git a/Source/modules/mediasource/MediaSource.cpp b/Source/modules/mediasource/MediaSource.cpp
index fc59c184b7744e2873a9a09ebac1be5f97ab40e7..4a08b568936d40c396df214f782d52b269465130 100644
--- a/Source/modules/mediasource/MediaSource.cpp
+++ b/Source/modules/mediasource/MediaSource.cpp
@@ -69,10 +69,10 @@ SourceBuffer* MediaSource::addSourceBuffer(const String& type, ExceptionCode& ec
     LOG(Media, "MediaSource::addSourceBuffer(%s) %p", type.ascii().data(), this);
 
     // 2.2 https://dvcs.w3.org/hg/html-media/raw-file/default/media-source/media-source.html#widl-MediaSource-addSourceBuffer-SourceBuffer-DOMString-type
-    // 1. If type is null or an empty then throw an INVALID_ACCESS_ERR exception and
+    // 1. If type is null or an empty then throw an InvalidAccessError exception and
     // abort these steps.
     if (type.isNull() || type.isEmpty()) {
-        ec = INVALID_ACCESS_ERR;
+        ec = InvalidAccessError;
         return 0;
     }
 
@@ -84,9 +84,9 @@ SourceBuffer* MediaSource::addSourceBuffer(const String& type, ExceptionCode& ec
     }
 
     // 4. If the readyState attribute is not in the "open" state then throw an
-    // INVALID_STATE_ERR exception and abort these steps.
+    // InvalidStateError exception and abort these steps.
     if (!isOpen()) {
-        ec = INVALID_STATE_ERR;
+        ec = InvalidStateError;
         return 0;
     }
 
@@ -116,10 +116,10 @@ void MediaSource::removeSourceBuffer(SourceBuffer* buffer, ExceptionCode& ec)
     RefPtr<SourceBuffer> protect(buffer);
 
     // 2.2 https://dvcs.w3.org/hg/html-media/raw-file/default/media-source/media-source.html#widl-MediaSource-removeSourceBuffer-void-SourceBuffer-sourceBuffer
-    // 1. If sourceBuffer is null then throw an INVALID_ACCESS_ERR exception and
+    // 1. If sourceBuffer is null then throw an InvalidAccessError exception and
     // abort these steps.
     if (!buffer) {
-        ec = INVALID_ACCESS_ERR;
+        ec = InvalidAccessError;
         return;
     }