Refactor GL surface format handling

ui/gl/init/gl_factory.h

Index: ui/gl/init/gl_factory.h
diff --git a/ui/gl/init/gl_factory.h b/ui/gl/init/gl_factory.h
index fad4fad757729e523a2e6bc3366973a0995fe83e..4e62d2106a6419c2c666144ba9079f1f31deee21 100644
--- a/ui/gl/init/gl_factory.h
+++ b/ui/gl/init/gl_factory.h
@@ -11,6 +11,7 @@
 #include "ui/gfx/geometry/size.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gl/gl_implementation.h"
+#include "ui/gl/gl_surface_format.h"
 #include "ui/gl/gpu_preference.h"
 #include "ui/gl/init/gl_init_export.h"
 
@@ -70,6 +71,9 @@ GL_INIT_EXPORT scoped_refptr<GLSurface> CreateSurfacelessViewGLSurface(
 GL_INIT_EXPORT scoped_refptr<GLSurface> CreateOffscreenGLSurface(
     const gfx::Size& size);
 
+GL_INIT_EXPORT scoped_refptr<GLSurface> CreateOffscreenGLSurfaceWithFormat(
+    const gfx::Size& size, GLSurfaceFormat format);
+
 }  // namespace init
 }  // namespace gl