Pass start/length at InlineTextBox construction time.

Source/core/rendering/InlineTextBox.h

 /*
  * (C) 1999 Lars Knoll (knoll@kde.org)
  * (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2009, 2010, 2011 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 22 matching lines @@
 
 struct CompositionUnderline;
 class DocumentMarker;
 class GraphicsContext;
 
 const unsigned short cNoTruncation = USHRT_MAX;
 const unsigned short cFullTruncation = USHRT_MAX - 1;
 
 class InlineTextBox : public InlineBox {
 public:
-    InlineTextBox(RenderObject& obj)
+    InlineTextBox(RenderObject& obj, int start, unsigned short length)
         : InlineBox(obj)
         , m_prevTextBox(0)
         , m_nextTextBox(0)
-        , m_start(0)
-        , m_len(0)
+        , m_start(start)
+        , m_len(length)
         , m_truncation(cNoTruncation)
     {
+        setIsText(true);
     }
 
     RenderText& renderer() const { return toRenderText(InlineBox::renderer()); }
 
     virtual void destroy() OVERRIDE FINAL;
 
     InlineTextBox* prevTextBox() const { return m_prevTextBox; }
     InlineTextBox* nextTextBox() const { return m_nextTextBox; }
     void setNextTextBox(InlineTextBox* n) { m_nextTextBox = n; }
     void setPreviousTextBox(InlineTextBox* p) { m_prevTextBox = p; }
 
     // FIXME: These accessors should ASSERT(!isDirty()). See https://bugs.webkit.org/show_bug.cgi?id=97264
     unsigned start() const { return m_start; }
     unsigned end() const { return m_len ? m_start + m_len - 1 : m_start; }
     unsigned len() const { return m_len; }
 
-    void setStart(unsigned start) { m_start = start; }
-    void setLen(unsigned len) { m_len = len; }
-
-    void offsetRun(int d) { ASSERT(!isDirty()); m_start += d; }
+    void offsetRun(int delta);
 
     unsigned short truncation() { return m_truncation; }
 
     virtual void markDirty() OVERRIDE FINAL;
 
     using InlineBox::hasHyphen;
     using InlineBox::setHasHyphen;
     using InlineBox::canHaveLeadingExpansion;
     using InlineBox::setCanHaveLeadingExpansion;
 
@@ skipping 118 matching lines @@
 
 inline AffineTransform InlineTextBox::rotation(const FloatRect& boxRect, RotationDirection rotationDirection)
 {
     return rotationDirection == Clockwise ? AffineTransform(0, 1, -1, 0, boxRect.x() + boxRect.maxY(), boxRect.maxY() - boxRect.x())
         : AffineTransform(0, -1, 1, 0, boxRect.x() - boxRect.maxY(), boxRect.x() + boxRect.maxY());
 }
 
 } // namespace blink
 
 #endif // InlineTextBox_h