Remove rendering dependency in GraphicsContextAnnotation

Source/core/rendering/GraphicsContextAnnotator.h

 /*
+ * Copyright (C) 2013 Google Inc. All rights reserved.
  * Copyright (C) 2013 Samsung Electronics. 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 ParentNode_h
-#define ParentNode_h
+#ifndef GraphicsContextAnnotator_h
+#define GraphicsContextAnnotator_h
 
-#include "core/dom/ContainerNode.h"
+#define ANNOTATE_GRAPHICS_CONTEXT(paintInfo, renderer) \
+    GraphicsContextAnnotator scopedGraphicsContextAnnotator; \
+    if (UNLIKELY(paintInfo.context->annotationMode())) \
+        scopedGraphicsContextAnnotator.annotate(paintInfo, renderer)
 
 namespace WebCore {
 
-class ParentNode {
+class GraphicsContext;
+struct PaintInfo;
+class RenderObject;
+
+class GraphicsContextAnnotator {
 public:
-    static PassRefPtr<HTMLCollection> children(ContainerNode* node)
+    GraphicsContextAnnotator()
+        : m_context(0)
+    { }
+
+    ~GraphicsContextAnnotator()
     {
-        return node->children();
+        if (UNLIKELY(m_context != 0))
+            finishAnnotation();
     }
 
-    static Element* firstElementChild(ContainerNode* node)
-    {
-        return node->firstElementChild();
-    }
+    void annotate(const PaintInfo&, const RenderObject*);
 
-    static Element* lastElementChild(ContainerNode* node)
-    {
-        return node->lastElementChild();
-    }
+private:
+    void finishAnnotation();
 
-    static unsigned childElementCount(ContainerNode* node)
-    {
-        return node->childElementCount();
-    }
+    GraphicsContext* m_context;
 };
 
 } // namespace WebCore
 
-#endif // ParentNode_h
+#endif // GraphicsContextAnnotator_h