ozone: caca: Preparatory work for resize / multiple windows

ui/ozone/platform/caca/caca_connection.h

 // Copyright 2014 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_OZONE_PLATFORM_CACA_CACA_CONNECTION_H_
 #define UI_OZONE_PLATFORM_CACA_CACA_CONNECTION_H_
 
 #include <caca.h>
 
 #include "base/macros.h"
 #include "ui/gfx/geometry/size.h"
+#include "ui/ozone/platform/caca/scoped_caca_types.h"
 
 namespace ui {
 
 // Basic initialization of Libcaca. This needs to be shared between SFO and EFO
 // since both need the |display_| to draw and process events respectively.
 // Note, |canvas_| needs to be here since it is needed for creating a
 // |display_|.
 class CacaConnection {
  public:
   CacaConnection();
   ~CacaConnection();
 
-  void Initialize();
+  bool Initialize();
 
   // This is the Caca canvas size.
   gfx::Size physical_size() const { return physical_size_; }
   gfx::Size bitmap_size() const { return bitmap_size_; }
-  caca_display_t* display() const { return display_; }
+  caca_display_t* display() const { return display_.get(); }
 
  private:
-  caca_canvas_t* canvas_;
-  caca_display_t* display_;
+  // Sync sizes with libcaca.
+  void UpdateDisplaySize();
+
+  ScopedCacaCanvas canvas_;
+  ScopedCacaDisplay display_;
 
   // Size of the console in characters. This can be changed by setting
   // CACA_GEOMETRY environment variable.
   gfx::Size physical_size_;
 
   // Size of the backing buffer we draw into. Size in pixels.
   gfx::Size bitmap_size_;
 
   DISALLOW_COPY_AND_ASSIGN(CacaConnection);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_CACA_CACA_CONNECTION_H_