Fix CJK font linking size on Windows XP.

ui/gfx/platform_font_win.h

Index: ui/gfx/platform_font_win.h
===================================================================
--- ui/gfx/platform_font_win.h	(revision 133692)
+++ ui/gfx/platform_font_win.h	(working copy)
@@ -47,6 +47,12 @@
   // name could not be retrieved, returns GetFontName().
   std::string GetLocalizedFontName() const;
 
+  // Returns a derived Font with the specified |style| and with height at most
+  // |height|. If the height and style of the receiver already match, it is
+  // returned. Otherwise, the returned Font will have the largest size such that
+  // its height is less than or equal to |height|.

[msw, 2012/04/26 21:04:42]

It's unclear (from the comment) why the resulting height might not exactly match
the argument height, is it worth mentioning why that's the case?

[Alexei Svitkine (slow), 2012/04/26 21:45:56]

I've expanded the comment to explain that.

+  Font DeriveFontWithHeight(int height, int style);
+
   // Overridden from PlatformFont:
   virtual Font DeriveFont(int size_delta, int style) const OVERRIDE;
   virtual int GetHeight() const OVERRIDE;
@@ -75,6 +81,7 @@
     // This constructor takes control of the HFONT, and will delete it when
     // the HFontRef is deleted.
     HFontRef(HFONT hfont,
+             int font_size,
              int height,
              int baseline,
              int ave_char_width,