Refactor GL surface format handling

ui/gl/gl_surface_osmesa_x11.cc

Index: ui/gl/gl_surface_osmesa_x11.cc
diff --git a/ui/gl/gl_surface_osmesa_x11.cc b/ui/gl/gl_surface_osmesa_x11.cc
index c2f018ccf968cd9822be1fbffe759ee5694d0689..2edb71663b29d9d68b90f12f9eee9249f15ff695 100644
--- a/ui/gl/gl_surface_osmesa_x11.cc
+++ b/ui/gl/gl_surface_osmesa_x11.cc
@@ -16,7 +16,8 @@
 namespace gl {
 
 GLSurfaceOSMesaX11::GLSurfaceOSMesaX11(gfx::AcceleratedWidget window)
-    : GLSurfaceOSMesa(SURFACE_OSMESA_BGRA, gfx::Size(1, 1)),
+    : GLSurfaceOSMesa(
+          GLSurfaceFormat(SURFACE_OSMESA_BGRA), gfx::Size(1, 1)),
       xdisplay_(gfx::GetXDisplay()),
       window_graphics_context_(0),
       window_(window),
@@ -41,7 +42,7 @@ bool GLSurfaceOSMesaX11::InitializeOneOff() {
   return true;
 }
 
-bool GLSurfaceOSMesaX11::Initialize(GLSurface::Format format) {
+bool GLSurfaceOSMesaX11::Initialize(GLSurfaceFormat format) {
   if (!GLSurfaceOSMesa::Initialize(format))
     return false;