Remove remaining HTML elements

sky/engine/core/html/imports/HTMLImport.h

-/*
- * 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
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef SKY_ENGINE_CORE_HTML_IMPORTS_HTMLIMPORT_H_
-#define SKY_ENGINE_CORE_HTML_IMPORTS_HTMLIMPORT_H_
-
-#include "sky/engine/core/html/imports/HTMLImportState.h"
-#include "sky/engine/platform/heap/Handle.h"
-#include "sky/engine/wtf/TreeNode.h"
-
-namespace blink {
-
-class Document;
-class LocalFrame;
-class HTMLImportChild;
-class HTMLImportLoader;
-class HTMLImportsController;
-class KURL;
-
-//
-// # Basic Data Structure and Algorithms of HTML Imports implemenation.
-//
-// ## The Import Tree
-//
-// HTML Imports form a tree:
-//
-// * The root of the tree is HTMLImportTreeRoot.
-//
-// * The HTMLImportTreeRoot is owned HTMLImportsController, which is owned by the master
-//   document as a DocumentSupplement.
-//
-// * The non-root nodes are HTMLImportChild. They are all owned by HTMLImporTreeRoot.
-//   LinkStyle is wired into HTMLImportChild by implementing HTMLImportChildClient interface
-//
-// * Both HTMLImportTreeRoot and HTMLImportChild are derived from HTMLImport superclass
-//   that models the tree data structure using WTF::TreeNode and provides a set of
-//   virtual functions.
-//
-// HTMLImportsController also owns all loaders in the tree and manages their lifetime through it.
-// One assumption is that the tree is append-only and nodes are never inserted in the middle of the tree nor removed.
-//
-// Full diagram is here:
-// https://docs.google.com/drawings/d/1jFQrO0IupWrlykTNzQ3Nv2SdiBiSz4UE9-V3-vDgBb0/
-//
-// # Import Sharing and HTMLImportLoader
-//
-// The HTML Imports spec calls for de-dup mechanism to share already loaded imports.
-// To implement this, the actual loading machinery is split out from HTMLImportChild to
-// HTMLImportLoader, and each loader shares HTMLImportLoader with other loader if the URL is same.
-// Check around HTMLImportsController::findLink() for more detail.
-//
-// HTMLImportLoader can be shared by multiple imports.
-//
-//    HTMLImportChild (1)-->(*) HTMLImportLoader
-//
-//
-// # Script Blocking
-//
-// - An import blocks the HTML parser of its own imported document from running <script>
-//   until all of its children are loaded.
-//   Note that dynamically added import won't block the parser.
-//
-// - An import under loading also blocks imported documents that follow from being created.
-//   This is because an import can include another import that has same URLs of following ones.
-//   In such case, the preceding import should be loaded and following ones should be de-duped.
-//
-
-// The superclass of HTMLImportTreeRoot and HTMLImportChild
-// This represents the import tree data structure.
-class HTMLImport : public TreeNode<HTMLImport> {
-public:
-    enum SyncMode {
-        Sync  = 0,
-        Async = 1
-    };
-
-    virtual ~HTMLImport() { }
-
-    // FIXME: Consider returning HTMLImportTreeRoot.
-    HTMLImport* root();
-    bool precedes(HTMLImport*);
-    bool isRoot() const { return !parent(); }
-    bool isSync() const { return SyncMode(m_sync) == Sync; }
-    bool formsCycle() const;
-    const HTMLImportState& state() const { return m_state; }
-
-    void appendImport(HTMLImport*);
-
-    virtual Document* document() const = 0;
-    virtual bool isDone() const = 0; // FIXME: Should be renamed to haveFinishedLoading()
-    virtual HTMLImportLoader* loader() const { return 0; }
-    virtual void stateWillChange() { }
-    virtual void stateDidChange();
-
-protected:
-    // Stating from most conservative state.
-    // It will be corrected through state update flow.
-    explicit HTMLImport(SyncMode sync)
-        : m_sync(sync)
-    { }
-
-    static void recalcTreeState(HTMLImport* root);
-
-#if !defined(NDEBUG)
-    void show();
-    void showTree(HTMLImport* highlight, unsigned depth);
-    virtual void showThis();
-#endif
-
-private:
-    HTMLImportState m_state;
-    unsigned m_sync : 1;
-};
-
-} // namespace blink
-
-#endif  // SKY_ENGINE_CORE_HTML_IMPORTS_HTMLIMPORT_H_