Fixed docs for webGL method variants (overloaded methods were getting the same comments).

sdk/lib/_blink/dartium/_blink_dartium.dart

 /**
  * This library provides entry points to the native Blink code which backs
  * up the dart:html library.
  */
 library dart.dom._blink;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:html';
 import 'dart:_internal' hide Symbol, deprecated;
@@ skipping 7168 matching lines @@
 
 Native_TreeWalker_previousNode_Callback(mthis) native "TreeWalker_previousNode_Callback_RESOLVER_STRING_0_";
 
 Native_TreeWalker_previousSibling_Callback(mthis) native "TreeWalker_previousSibling_Callback_RESOLVER_STRING_0_";
 
   // Generated overload resolver
 Native_URL_createObjectUrl(blob_OR_source_OR_stream) {
     if ((blob_OR_source_OR_stream is Blob || blob_OR_source_OR_stream == null)) {
       return Native_URL__createObjectURL_1_Callback(blob_OR_source_OR_stream);
     }
-    if ((blob_OR_source_OR_stream is MediaStream || blob_OR_source_OR_stream == null)) {
+    if ((blob_OR_source_OR_stream is MediaSource || blob_OR_source_OR_stream == null)) {
       return Native_URL__createObjectURL_2_Callback(blob_OR_source_OR_stream);
     }
-    if ((blob_OR_source_OR_stream is MediaSource || blob_OR_source_OR_stream == null)) {
+    if ((blob_OR_source_OR_stream is MediaStream || blob_OR_source_OR_stream == null)) {
       return Native_URL__createObjectURL_3_Callback(blob_OR_source_OR_stream);
     }
     throw new ArgumentError("Incorrect number or type of arguments");
   }
 
 Native_URL__createObjectURL_1_Callback(blob_OR_source_OR_stream) native "URL_createObjectURL_Callback_RESOLVER_STRING_1_Blob";
 
-Native_URL__createObjectURL_2_Callback(blob_OR_source_OR_stream) native "URL_createObjectURL_Callback_RESOLVER_STRING_1_MediaStream";
+Native_URL__createObjectURL_2_Callback(blob_OR_source_OR_stream) native "URL_createObjectURL_Callback_RESOLVER_STRING_1_MediaSource";
 
-Native_URL__createObjectURL_3_Callback(blob_OR_source_OR_stream) native "URL_createObjectURL_Callback_RESOLVER_STRING_1_MediaSource";
+Native_URL__createObjectURL_3_Callback(blob_OR_source_OR_stream) native "URL_createObjectURL_Callback_RESOLVER_STRING_1_MediaStream";
 
 Native_URL_createObjectUrlFromBlob_Callback(blob) native "URL_createObjectURL_Callback_RESOLVER_STRING_1_Blob";
 
 Native_URL_createObjectUrlFromSource_Callback(source) native "URL_createObjectURL_Callback_RESOLVER_STRING_1_MediaSource";
 
 Native_URL_createObjectUrlFromStream_Callback(stream) native "URL_createObjectURL_Callback_RESOLVER_STRING_1_MediaStream";
 
 Native_URL_revokeObjectURL_Callback(url) native "URL_revokeObjectURL_Callback_RESOLVER_STRING_1_DOMString";
 
 Native_URL_hash_Getter(mthis) native "URL_hash_Getter";
@@ skipping 1147 matching lines @@
 // _DOMStringMap native entry  points
 Native_DOMStringMap_containsKey(_DOMStringMap, key) native "DOMStringMap_containsKey_Callback";
 
 Native_DOMStringMap_item(_DOMStringMap, key) native "DOMStringMap_item_Callback";
 
 Native_DOMStringMap_setItem(_DOMStringMap, key, value) native "DOMStringMap_setItem_Callback";
 
 Native_DOMStringMap_remove(_DOMStringMap, key) native "DOMStringMap_remove_Callback";
 
 Native_DOMStringMap_get_keys(_DOMStringMap) native "DOMStringMap_getKeys_Callback";