Move all style invalidation code into the css/invalidation directory.

Source/core/css/analyzer/DescendantInvalidationSet.h

-/*
- * Copyright (C) 2014 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 DescendantInvalidationSet_h
-#define DescendantInvalidationSet_h
-
-#include "wtf/Forward.h"
-#include "wtf/HashSet.h"
-#include "wtf/RefCounted.h"
-#include "wtf/RefPtr.h"
-#include "wtf/text/AtomicStringHash.h"
-#include "wtf/text/StringHash.h"
-
-namespace WebCore {
-
-class Element;
-
-// Tracks data to determine which elements of a DOM subtree need to have style
-// recalculated.
-class DescendantInvalidationSet FINAL : public RefCounted<DescendantInvalidationSet> {
-public:
-    static PassRefPtr<DescendantInvalidationSet> create()
-    {
-        return adoptRef(new DescendantInvalidationSet);
-    }
-
-    void combine(const DescendantInvalidationSet& other);
-
-    void addClass(const AtomicString& className);
-    void addId(const AtomicString& id);
-    void addTagName(const AtomicString& tagName);
-    void addAttribute(const AtomicString& attributeLocalName);
-
-    // Appends the classes in this DescendantInvalidationSet to the vector.
-    void getClasses(Vector<AtomicString>& classes) const;
-
-    // Appends the attributes in this DescendantInvalidationSet to the vector.
-    void getAttributes(Vector<AtomicString>& attributes) const;
-
-    void setWholeSubtreeInvalid();
-    bool wholeSubtreeInvalid() const { return m_allDescendantsMightBeInvalid; }
-private:
-    DescendantInvalidationSet();
-
-    HashSet<AtomicString>& ensureClassSet();
-    HashSet<AtomicString>& ensureIdSet();
-    HashSet<AtomicString>& ensureTagNameSet();
-    HashSet<AtomicString>& ensureAttributeSet();
-
-    // If true, all descendants might be invalidated, so a full subtree recalc is required.
-    bool m_allDescendantsMightBeInvalid;
-
-    // FIXME: optimize this if it becomes a memory issue.
-    OwnPtr<HashSet<AtomicString> > m_classes;
-    OwnPtr<HashSet<AtomicString> > m_ids;
-    OwnPtr<HashSet<AtomicString> > m_tagNames;
-    OwnPtr<HashSet<AtomicString> > m_attributes;
-};
-
-} // namespace WebCore
-
-#endif // DescendantInvalidationSet_h