Fold ScrollingCoordinatorChromium into ScrollingCoordinator and devirtualize

Source/WebCore/page/scrolling/ScrollingStateNode.cpp

Index: Source/WebCore/page/scrolling/ScrollingStateNode.cpp
diff --git a/Source/WebCore/page/scrolling/ScrollingStateNode.cpp b/Source/WebCore/page/scrolling/ScrollingStateNode.cpp
deleted file mode 100644
index 8e32b461123e2f9894eb3825d705d401ebac3e4a..0000000000000000000000000000000000000000
--- a/Source/WebCore/page/scrolling/ScrollingStateNode.cpp
+++ /dev/null
@@ -1,151 +0,0 @@
-/*
- * Copyright (C) 2012 Apple 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:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. 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.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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.
- */
-
-#include "config.h"
-#include "ScrollingStateNode.h"
-
-#include "ScrollingStateFixedNode.h"
-#include "ScrollingStateTree.h"
-#include "TextStream.h"
-
-#include <wtf/text/WTFString.h>
-
-#if ENABLE(THREADED_SCROLLING)
-
-namespace WebCore {
-
-ScrollingStateNode::ScrollingStateNode(ScrollingStateTree* scrollingStateTree, ScrollingNodeID nodeID)
-    : m_scrollingStateTree(scrollingStateTree)
-    , m_nodeID(nodeID)
-    , m_changedProperties(0)
-    , m_parent(0)
-{
-}
-
-// This copy constructor is used for cloning nodes in the tree, and it doesn't make sense
-// to clone the relationship pointers, so don't copy that information from the original
-// node.
-ScrollingStateNode::ScrollingStateNode(const ScrollingStateNode& stateNode)
-    : m_scrollingStateTree(0)
-    , m_nodeID(stateNode.scrollingNodeID())
-    , m_changedProperties(stateNode.changedProperties())
-    , m_parent(0)
-{
-    // FIXME: why doesn't this set the GraphicsLayer?
-    setScrollPlatformLayer(stateNode.platformScrollLayer());
-}
-
-ScrollingStateNode::~ScrollingStateNode()
-{
-}
-
-PassOwnPtr<ScrollingStateNode> ScrollingStateNode::cloneAndReset()
-{
-    OwnPtr<ScrollingStateNode> clone = this->clone();
-
-    // Now that this node is cloned, reset our change properties.
-    resetChangedProperties();
-
-    cloneAndResetChildren(clone.get());
-    return clone.release();
-}
-
-void ScrollingStateNode::cloneAndResetChildren(ScrollingStateNode* clone)
-{
-    if (!m_children)
-        return;
-
-    size_t size = m_children->size();
-    for (size_t i = 0; i < size; ++i)
-        clone->appendChild(m_children->at(i)->cloneAndReset());
-}
-
-void ScrollingStateNode::appendChild(PassOwnPtr<ScrollingStateNode> childNode)
-{
-    childNode->setParent(this);
-
-    if (!m_children)
-        m_children = adoptPtr(new Vector<OwnPtr<ScrollingStateNode> >);
-
-    m_children->append(childNode);
-}
-
-void ScrollingStateNode::removeChild(ScrollingStateNode* node)
-{
-    if (!m_children)
-        return;
-
-    size_t index = m_children->find(node);
-
-    // The index will be notFound if the node to remove is a deeper-than-1-level descendant or
-    // if node is the root state node.
-    if (index != notFound) {
-        m_scrollingStateTree->didRemoveNode(node->scrollingNodeID());
-        m_children->remove(index);
-        return;
-    }
-
-    size_t size = m_children->size();
-    for (size_t i = 0; i < size; ++i)
-        m_children->at(i)->removeChild(node);
-}
-
-void ScrollingStateNode::writeIndent(TextStream& ts, int indent)
-{
-    for (int i = 0; i != indent; ++i)
-        ts << "  ";
-}
-
-void ScrollingStateNode::dump(TextStream& ts, int indent) const
-{
-    writeIndent(ts, indent);
-    dumpProperties(ts, indent);
-
-    if (m_children) {
-        writeIndent(ts, indent + 1);
-        size_t size = children()->size();
-        ts << "(children " << size << "\n";
-        
-        for (size_t i = 0; i < size; i++)
-            m_children->at(i)->dump(ts, indent + 2);
-        writeIndent(ts, indent + 1);
-        ts << ")\n";
-    }
-
-    writeIndent(ts, indent);
-    ts << ")\n";
-}
-
-String ScrollingStateNode::scrollingStateTreeAsText() const
-{
-    TextStream ts;
-
-    dump(ts, 0);
-    return ts.release();
-}
-
-} // namespace WebCore
-
-#endif // ENABLE(THREADED_SCROLLING)