ozone: caca: Fix the build

ui/ozone/platform/caca/caca_surface_factory.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_SURFACE_FACTORY_H_
 #define UI_OZONE_PLATFORM_CACA_CACA_SURFACE_FACTORY_H_
 
 #include <caca.h>
 
 #include "base/memory/scoped_ptr.h"
 #include "ui/gfx/ozone/surface_factory_ozone.h"
 
+namespace gfx {
+class SurfaceOzone;
+}
+
 namespace ui {
 
 class CacaConnection;
 
 class CacaSurfaceFactory : public gfx::SurfaceFactoryOzone {
  public:
   CacaSurfaceFactory(CacaConnection* connection);
   virtual ~CacaSurfaceFactory();
 
   // gfx::SurfaceFactoryOzone overrides:
   virtual HardwareState InitializeHardware() OVERRIDE;
   virtual void ShutdownHardware() OVERRIDE;
   virtual gfx::AcceleratedWidget GetAcceleratedWidget() OVERRIDE;
   virtual bool LoadEGLGLES2Bindings(
       AddGLLibraryCallback add_gl_library,
       SetGLGetProcAddressProcCallback set_gl_get_proc_address) OVERRIDE;
-  virtual scoped_ptr<gfx::SurfaceOzone> CreateSurfaceForWidget(
+  virtual scoped_ptr<gfx::SurfaceOzoneCanvas> CreateCanvasForWidget(
       gfx::AcceleratedWidget widget) OVERRIDE;
 
  private:
   HardwareState state_;
 
   CacaConnection* connection_;  // Not owned.
 
   DISALLOW_COPY_AND_ASSIGN(CacaSurfaceFactory);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_CACA_CACA_SURFACE_FACTORY_H_