Change string16 to std::string in the gfx::Font() interface.

ui/gfx/platform_font_pango.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_PLATFORM_FONT_PANGO_H_
 #define UI_GFX_PLATFORM_FONT_PANGO_H_
 #pragma once
 
 #include "base/memory/scoped_ptr.h"
 #include "third_party/skia/include/core/SkRefCnt.h"
 #include "ui/gfx/platform_font.h"
 
 class SkTypeface;
 class SkPaint;
 
 namespace gfx {
 
 class UI_EXPORT PlatformFontPango : public PlatformFont {
  public:
   PlatformFontPango();
   explicit PlatformFontPango(const Font& other);
   explicit PlatformFontPango(NativeFont native_font);
-  PlatformFontPango(const string16& font_name, int font_size);
+  PlatformFontPango(const std::string& font_name, int font_size);
 
   // Converts |gfx_font| to a new pango font. Free the returned font with
   // pango_font_description_free().
   static PangoFontDescription* PangoFontFromGfxFont(const gfx::Font& gfx_font);
 
   // Resets and reloads the cached system font used by the default constructor.
   // This function is useful when the system font has changed, for example, when
   // the locale has changed.
   static void ReloadDefaultFont();
 
   // Position as an offset from the height of the drawn text, used to draw
   // an underline. This is a negative number, so the underline would be
   // drawn at y + height + underline_position;
   double underline_position() const;
   // The thickness to draw the underline.
   double underline_thickness() const;
 
   // Overridden from PlatformFont:
   virtual Font DeriveFont(int size_delta, int style) const;
   virtual int GetHeight() const;
   virtual int GetBaseline() const;
   virtual int GetAverageCharacterWidth() const;
   virtual int GetStringWidth(const string16& text) const;
   virtual int GetExpectedTextWidth(int length) const;
   virtual int GetStyle() const;
-  virtual string16 GetFontName() const;
+  virtual std::string GetFontName() const;
   virtual int GetFontSize() const;
   virtual NativeFont GetNativeFont() const;
 
  private:
   // Create a new instance of this object with the specified properties. Called
   // from DeriveFont.
   PlatformFontPango(SkTypeface* typeface,
-                  const string16& name,
-                  int size,
-                  int style);
+                    const std::string& name,
+                    int size,
+                    int style);
   virtual ~PlatformFontPango();
 
   // Initialize this object.
-  void InitWithNameAndSize(const string16& font_name, int font_size);
+  void InitWithNameAndSize(const std::string& font_name, int font_size);
   void InitWithTypefaceNameSizeAndStyle(SkTypeface* typeface,
-                                        const string16& name,
+                                        const std::string& name,
                                         int size,
                                         int style);
   void InitFromPlatformFont(const PlatformFontPango* other);
 
   // Potentially slow call to get pango metrics (average width, underline info).
   void InitPangoMetrics();
 
   // Setup a Skia context to use the current typeface
   void PaintSetup(SkPaint* paint) const;
 
   // Make |this| a copy of |other|.
   void CopyFont(const Font& other);
 
   // The average width of a character, initialized and cached if needed.
   double GetAverageWidth() const;
 
   // These two both point to the same SkTypeface. We use the SkAutoUnref to
   // handle the reference counting, but without @typeface_ we would have to
   // cast the SkRefCnt from @typeface_helper_ every time.
   scoped_ptr<SkAutoUnref> typeface_helper_;
   SkTypeface* typeface_;
 
   // Additional information about the face
   // Skia actually expects a family name and not a font name.
-  string16 font_family_;
+  std::string font_family_;
   int font_size_pixels_;
   int style_;
 
   // Cached metrics, generated at construction
   int height_pixels_;
   int ascent_pixels_;
 
   // The pango metrics are much more expensive so we wait until we need them
   // to compute them.
   bool pango_metrics_inited_;
   double average_width_pixels_;
   double underline_position_pixels_;
   double underline_thickness_pixels_;
 
   // The default font, used for the default constructor.
   static Font* default_font_;
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_PLATFORM_FONT_PANGO_H_