Introduce the fallback theme engine that will be used to paint a fallback UI

Source/Platform/chromium/public/WebFallbackThemeEngine.h

 /*
  * Copyright (C) 2010 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 10 matching lines @@
  * 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 WebThemeEngine_h
-#define WebThemeEngine_h
+#ifndef WebFallbackThemeEngine_h
+#define WebFallbackThemeEngine_h
 
-#include "../WebCanvas.h"
-#include "../WebColor.h"
-#include "../WebSize.h"
+#include "WebCanvas.h"
+#include "WebColor.h"
+#include "WebSize.h"
 
 namespace WebKit {
 
 struct WebRect;
 
-class WebThemeEngine {
+class WebFallbackThemeEngine {
 public:
     // The UI part which is being accessed.
     enum Part {
         // ScrollbarTheme parts
         PartScrollbarDownArrow,
         PartScrollbarLeftArrow,
         PartScrollbarRightArrow,
         PartScrollbarUpArrow,
         PartScrollbarHorizontalThumb,
         PartScrollbarVerticalThumb,
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     // like vertical scrollbar thumbs, the width will be the required width of
     // the track while the height will be the minimum height.
     virtual WebSize getSize(Part) { return WebSize(); }
     // Paint the given the given theme part.
     virtual void paint(WebCanvas*, Part, State, const WebRect&, const ExtraParams*) { }
 };
 
 } // namespace WebKit
 
 #endif