Remove Element#attributes.

sky/engine/bindings/core/v8/V8GCController.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 66 matching lines @@
     // The same special handling is in V8GCController::gcTree().
     // Maybe should image elements be active DOM nodes?
     // See https://code.google.com/p/chromium/issues/detail?id=164882
     if (node->inDocument() || (isHTMLImageElement(*node) && toHTMLImageElement(*node).hasPendingActivity())) {
         Document& document = node->document();
         if (HTMLImportsController* controller = document.importsController())
             return controller->master();
         return &document;
     }
 
-    if (node->isAttributeNode()) {
-        Node* ownerElement = toAttr(node)->ownerElement();
-        if (!ownerElement)
-            return node;
-        node = ownerElement;
-    }
-
     while (Node* parent = node->parentOrShadowHostOrTemplateHostNode())
         node = parent;
 
     return node;
 }
 
 // Regarding a minor GC algorithm for DOM nodes, see this document:
 // https://docs.google.com/a/google.com/presentation/d/1uifwVYGNYTZDoGLyCb7sXa7g49mWNMW2gaWvMN5NLk8/edit#slide=id.p
 class MinorGCWrapperVisitor : public v8::PersistentHandleVisitor {
 public:
@@ skipping 314 matching lines @@
     static size_t lastUsageReportedToV8 = 0;
 
     size_t currentUsage = Partitions::currentDOMMemoryUsage();
     int64_t diff = static_cast<int64_t>(currentUsage) - static_cast<int64_t>(lastUsageReportedToV8);
     isolate->AdjustAmountOfExternalAllocatedMemory(diff);
 
     lastUsageReportedToV8 = currentUsage;
 }
 
 } // namespace blink