Move RenderTextInfo and WordMeasurement into their own headers.

Source/core/rendering/line/WordMeasurement.h

Index: Source/core/rendering/line/WordMeasurement.h
diff --git a/Source/core/html/HTMLBDIElement.h b/Source/core/rendering/line/WordMeasurement.h
similarity index 55%
copy from Source/core/html/HTMLBDIElement.h
copy to Source/core/rendering/line/WordMeasurement.h
index 52db54e936990494173f9afad51b6e5e4f314117..46803dd0c5612b35cd35c5122ac99d82808637a3 100644
--- a/Source/core/html/HTMLBDIElement.h
+++ b/Source/core/rendering/line/WordMeasurement.h
@@ -1,5 +1,8 @@
 /*
- * Copyright (C) 2012 Google Inc. All rights reserved.
+ * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
+ * Copyright (C) 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All right reserved.
+ * Copyright (C) 2010 Google Inc. All rights reserved.
+ * Copyright (C) 2013 Adobe Systems Incorporated.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ -18,28 +21,33 @@
  *
  */
 
-#ifndef HTMLBDIElement_h
-#define HTMLBDIElement_h
+#ifndef WordMeasurement_h
+#define WordMeasurement_h
 
-#include "core/html/HTMLElement.h"
+#include "platform/fonts/SimpleFontData.h"
+#include "wtf/HashSet.h"
 
 namespace WebCore {
 
-class HTMLBDIElement FINAL : public HTMLElement {
-public:
-    DECLARE_NODE_FACTORY(HTMLBDIElement);
+class RenderText;
 
-private:
-    inline explicit HTMLBDIElement(Document& document)
-        : HTMLElement(HTMLNames::bdiTag, document)
+class WordMeasurement {
+public:
+    WordMeasurement()
+        : renderer(0)
+        , width(0)
+        , startOffset(0)
+        , endOffset(0)
     {
-        // FIXME: Rename setSelfOrAncestorHasDirAutoAttribute to reflect the fact bdi also uses this flag.
-        setSelfOrAncestorHasDirAutoAttribute(true);
     }
-};
 
-DEFINE_NODE_FACTORY(HTMLBDIElement)
+    RenderText* renderer;
+    float width;
+    int startOffset;
+    int endOffset;
+    HashSet<const SimpleFontData*> fallbackFonts;
+};
 
 } // namespace WebCore
 
-#endif
+#endif // WordMeasurement_h