Read EDID for the 1st display for startup

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 36 matching lines @@
     }
   }
   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 = NULL;
+  unsigned char* prop = nullptr;
   XRRGetOutputProperty(display,
                        output,
                        edid_property,
                        0,                // offset
                        128,              // length
                        false,            // _delete
                        false,            // pending
                        AnyPropertyType,  // req_type
                        &actual_type,
                        &actual_format,
                        &nitems,
                        &bytes_after,
                        &prop);
   DCHECK_EQ(XA_INTEGER, actual_type);
   DCHECK_EQ(8, actual_format);
   edid->assign(prop, prop + nitems);
   XFree(prop);
   return true;
 }
 
 // Gets some useful data from the specified output device, such like
 // manufacturer's ID, product code, and human readable name. Returns false if it
 // fails to get those data and doesn't touch manufacturer ID/product code/name.
-// NULL can be passed for unwanted output parameters.
+// nullptr can be passed for unwanted output parameters.
 bool GetOutputDeviceData(XID output,
                          uint16_t* manufacturer_id,
                          std::string* human_readable_name) {
   std::vector<uint8_t> edid;
   if (!GetEDIDProperty(output, &edid))
     return false;
 
-  bool result = ParseOutputDeviceData(
-      edid, manufacturer_id, human_readable_name);
-  return result;
+  return ParseOutputDeviceData(edid, manufacturer_id, human_readable_name,
+                               nullptr, nullptr);
 }
 
 }  // namespace
 
 bool GetDisplayId(XID output_id,
                   uint8_t output_index,
                   int64_t* display_id_out) {
   std::vector<uint8_t> edid;
   if (!GetEDIDProperty(output_id, &edid))
     return false;
 
   bool result = GetDisplayIdFromEDID(edid, output_index, display_id_out);
   return result;
 }
 
 std::string GetDisplayName(RROutput output) {
   std::string display_name;
-  GetOutputDeviceData(output, NULL, &display_name);
+  GetOutputDeviceData(output, nullptr, &display_name);
   return display_name;
 }
 
 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