Implement Pango RenderText for Linux.

ui/gfx/pango_util.h

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef UI_GFX_PANGO_UTIL_H_
+#define UI_GFX_PANGO_UTIL_H_
+#pragma once
+
+#include <pango/pango.h>
+#include "base/i18n/rtl.h"
+#include "base/string16.h"
+
+// TODO(xji): move other pango related functions from gtk_util to here.
+
+namespace gfx {
+
+class Font;
+
+// Setup pango layout |layout|, including set layout text as |text|, font
+// description based on |font|, width as |width| in PANGO_SCALE for RTL lcoale,
+// and set up whether auto-detect directionality, alignment, ellipsis, word
+// wrapping, resolution etc.
+void SetupPangoLayout(PangoLayout* layout,
+                      const string16& text,
+                      const gfx::Font& font,
+                      int width,
+                      base::i18n::TextDirection text_direction,
+                      int flags);
+}  // namespace gfx
+
+#endif  // UI_GFX_PANGO_UTIL_H_