aura: Make 'ui' buildable without gtk.

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_GTK_
 #define UI_GFX_PLATFORM_FONT_GTK_
 #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 PlatformFontGtk : public PlatformFont {
+class UI_EXPORT PlatformFontPango : public PlatformFont {
  public:
-  PlatformFontGtk();
-  explicit PlatformFontGtk(const Font& other);
-  explicit PlatformFontGtk(NativeFont native_font);
-  PlatformFontGtk(const string16& font_name,
+  PlatformFontPango();
+  explicit PlatformFontPango(const Font& other);
+  explicit PlatformFontPango(NativeFont native_font);
+  PlatformFontPango(const string16& 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();
@@ skipping 13 matching lines @@
   virtual int GetStringWidth(const string16& text) const;
   virtual int GetExpectedTextWidth(int length) const;
   virtual int GetStyle() const;
   virtual string16 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.
-  PlatformFontGtk(SkTypeface* typeface,
+  PlatformFontPango(SkTypeface* typeface,
                   const string16& name,
                   int size,
                   int style);
-  virtual ~PlatformFontGtk();
+  virtual ~PlatformFontPango();
 
   // Initialize this object.
   void InitWithNameAndSize(const string16& font_name, int font_size);
   void InitWithTypefaceNameSizeAndStyle(SkTypeface* typeface,
                                         const string16& name,
                                         int size,
                                         int style);
-  void InitFromPlatformFont(const PlatformFontGtk* other);
+  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);
 
@@ skipping 23 matching lines @@
   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_GTK_