ozone: Allow building for ozone without depending on pango

ui/gfx/ozone/impl/software_surface_factory_ozone.h

Index: ui/gfx/ozone/impl/software_surface_factory_ozone.h
diff --git a/ui/gfx/ozone/impl/software_surface_factory_ozone.h b/ui/gfx/ozone/impl/software_surface_factory_ozone.h
index d6fa1e97a2f19f16b5ee85dcb7ac590662b497b8..fe5d7fd7a8f20dd4efd26ff87c131e4d5dba3ab0 100644
--- a/ui/gfx/ozone/impl/software_surface_factory_ozone.h
+++ b/ui/gfx/ozone/impl/software_surface_factory_ozone.h
@@ -6,6 +6,7 @@
 #define UI_GFX_OZONE_IMPL_SOFTWARE_SURFACE_FACTORY_OZONE_H_
 
 #include "base/memory/scoped_ptr.h"
+#include "ui/gfx/gfx_export.h"
 #include "ui/gfx/ozone/surface_factory_ozone.h"
 
 namespace gfx {
@@ -17,7 +18,7 @@ class SoftwareSurfaceOzone;
 // SurfaceFactoryOzone implementation on top of DRM/KMS using dumb buffers.
 // This implementation is used in conjunction with the software rendering
 // path.
-class SoftwareSurfaceFactoryOzone : public SurfaceFactoryOzone {
+class GFX_EXPORT SoftwareSurfaceFactoryOzone : public SurfaceFactoryOzone {
  public:
   SoftwareSurfaceFactoryOzone();
   virtual ~SoftwareSurfaceFactoryOzone();