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

ui/display/util/x11/edid_parser_x11.cc

 // Copyright 2014 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.
 
 #include "ui/display/util/x11/edid_parser_x11.h"
 
 #include <X11/extensions/Xrandr.h>
 #include <X11/Xatom.h>
 #include <X11/Xlib.h>
 
@@ skipping 21 matching lines @@
     return false;
 
   Display* display = gfx::GetXDisplay();
 
   static Atom edid_property = XInternAtom(
       gfx::GetXDisplay(),
       RR_PROPERTY_RANDR_EDID, false);
 
   bool has_edid_property = false;
   int num_properties = 0;
-  Atom* properties = XRRListOutputProperties(display, output, &num_properties);
+  gfx::XScopedPtr<Atom[]> properties(
+      XRRListOutputProperties(display, output, &num_properties));
   for (int i = 0; i < num_properties; ++i) {
     if (properties[i] == edid_property) {
       has_edid_property = true;
       break;
     }
   }
-  XFree(properties);
   if (!has_edid_property)
     return false;
 
   Atom actual_type;
   int actual_format;
   unsigned long bytes_after;
   unsigned long nitems = 0;
   unsigned char* prop = nullptr;
   XRRGetOutputProperty(display,
                        output,
@@ skipping 52 matching lines @@
 bool GetOutputOverscanFlag(RROutput output, bool* flag) {
   std::vector<uint8_t> edid;
   if (!GetEDIDProperty(output, &edid))
     return false;
 
   bool found = ParseOutputOverscanFlag(edid, flag);
   return found;
 }
 
 }  // namespace ui