x11: Use scoped_ptr<> for X11 objects where it makes sense.

ui/gl/gl_image_glx.cc

Index: ui/gl/gl_image_glx.cc
diff --git a/ui/gl/gl_image_glx.cc b/ui/gl/gl_image_glx.cc
index 84c4d0c247e86e80abad99ee4d4eb13af7f92549..dea6cd64bb0f6e3ddabe88a8ce8a415471ceaf33 100644
--- a/ui/gl/gl_image_glx.cc
+++ b/ui/gl/gl_image_glx.cc
@@ -16,13 +16,6 @@ namespace gfx {
 
 namespace {
 
-// scoped_ptr functor for XFree(). Use as follows:
-//   scoped_ptr<XVisualInfo, ScopedPtrXFree> foo(...);
-// where "XVisualInfo" is any X type that is freed with XFree.
-struct ScopedPtrXFree {
-  void operator()(void* x) const { ::XFree(x); }
-};
-
 bool ValidFormat(unsigned internalformat) {
   switch (internalformat) {
     case GL_RGB:
@@ -141,11 +134,9 @@ bool GLImageGLX::Initialize(XID pixmap) {
       BindToTextureFormat(internalformat_), GL_TRUE,
       0};
   int num_elements = 0;
-  scoped_ptr<GLXFBConfig, ScopedPtrXFree> config(
-      glXChooseFBConfig(gfx::GetXDisplay(),
-                        DefaultScreen(gfx::GetXDisplay()),
-                        config_attribs,
-                        &num_elements));
+  gfx::XScopedPtr<GLXFBConfig> config(
+      glXChooseFBConfig(gfx::GetXDisplay(), DefaultScreen(gfx::GetXDisplay()),
+                        config_attribs, &num_elements));
   if (!config.get()) {
     DVLOG(0) << "glXChooseFBConfig failed.";
     return false;