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

ui/gfx/x/x11_types.h

 // Copyright (c) 2013 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_GFX_X_X11_UTIL_H_
 #define UI_GFX_X_X11_UTIL_H_
 
 #include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
 #include "ui/gfx/gfx_export.h"
 
 typedef unsigned long XAtom;
 typedef unsigned long XID;
 typedef struct _XImage XImage;
 typedef struct _XGC *GC;
 typedef struct _XDisplay XDisplay;
 
+extern "C" {
+int XFree(void*);
+}
+
 namespace gfx {
 
+template <class T, class R, R (*F)(T*)>
+struct XObjectDeleter {
+  inline void operator()(void* ptr) const { F(static_cast<T*>(ptr)); }
+};
+
+template <class T, class D = XObjectDeleter<void, int, XFree>>
+using XScopedPtr = scoped_ptr<T, D>;
+
 // TODO(oshima|evan): This assume there is one display and doesn't work
 // undef multiple displays/monitor environment. Remove this and change the
 // chrome codebase to get the display from window.
 GFX_EXPORT XDisplay* GetXDisplay();
 
 // This opens a new X11 XDisplay*, taking command line arguments into account.
 GFX_EXPORT XDisplay* OpenNewXDisplay();
 
 // Return the number of bits-per-pixel for a pixmap of the given depth
 GFX_EXPORT int BitsPerPixelForPixmapDepth(XDisplay* display, int depth);
@@ skipping 18 matching lines @@
                              const uint8* data,
                              int data_width, int data_height,
                              int src_x, int src_y,
                              int dst_x, int dst_y,
                              int copy_width, int copy_height);
 
 }  // namespace gfx
 
 #endif  // UI_GFX_X_X11_UTIL_H_