Refactoring: Get rid of HTMLImportRoot.

Source/core/html/imports/HTMLImport.cpp

 /*
  * Copyright (C) 2013 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 18 matching lines @@
  */
 
 #include "config.h"
 #include "core/html/imports/HTMLImport.h"
 
 #include "core/dom/Document.h"
 #include "core/html/imports/HTMLImportStateResolver.h"
 
 namespace WebCore {
 
+HTMLImport* HTMLImport::root()
+{
+    HTMLImport* i = this;
+    while (i->parent())
+        i = i->parent();
+    return i;
+}
+
 void HTMLImport::appendChild(HTMLImport* child)
 {
     TreeNode<HTMLImport>::appendChild(child);
 
     // This prevents HTML parser from going beyond the
     // blockage line before the precise state is computed by recalcState().
     if (child->isSync())
         m_state = HTMLImportState::blockedState();
 
     stateWillChange();
 }
 
 void HTMLImport::stateDidChange()
 {
     if (!state().shouldBlockScriptExecution()) {
         if (Document* document = this->document())
             document->didLoadAllImports();
     }
 }
 
-void HTMLImport::stateWillChange()
-{
-    root()->scheduleRecalcState();
-}
-
 void HTMLImport::recalcTreeState(HTMLImport* root)
 {
-    ASSERT(root == root->root());
-
     HashMap<HTMLImport*, HTMLImportState> snapshot;
     Vector<HTMLImport*> updated;
 
     for (HTMLImport* i = root; i; i = traverseNext(i)) {
         snapshot.add(i, i->state());
         i->m_state = HTMLImportState::invalidState();
     }
 
     // The post-visit DFS order matters here because
     // HTMLImportStateResolver in recalcState() Depends on
@@ skipping 34 matching lines @@
         child->showTree(highlight, depth + 1);
 }
 
 void HTMLImport::showThis()
 {
     fprintf(stderr, "%p state=%d", this, m_state.peekValueForDebug());
 }
 #endif
 
 } // namespace WebCore