Windows implementation of multiline RenderText

ui/gfx/render_text_win.h

Index: ui/gfx/render_text_win.h
diff --git a/ui/gfx/render_text_win.h b/ui/gfx/render_text_win.h
index 620ef092dff98fd2175427ab390b253aa3057198..69bf6022301d37dda52da40c92f2ac411061240d 100644
--- a/ui/gfx/render_text_win.h
+++ b/ui/gfx/render_text_win.h
@@ -64,6 +64,7 @@ class RenderTextWin : public RenderText {
 
   // Overridden from RenderText:
   virtual Size GetStringSize() OVERRIDE;
+  virtual Size GetMultilineTextSize() OVERRIDE;
   virtual int GetBaseline() OVERRIDE;
   virtual SelectionModel FindCursorPosition(const Point& point) OVERRIDE;
   virtual std::vector<FontSpan> GetFontSpansForTesting() OVERRIDE;
@@ -92,6 +93,9 @@ class RenderTextWin : public RenderText {
   void LayoutVisualText();
   void LayoutTextRun(internal::TextRun* run);
 
+  // Computes Line structs using the current text run data. Calls |set_lines()|.
+  void ComputeLines();
+
   // Helper function that calls |ScriptShape()| on the run, which has logic to
   // handle E_OUTOFMEMORY return codes.
   HRESULT ShapeTextRunWithFont(internal::TextRun* run, const Font& font);