GN: Separately track labels and origins for lists of stuff

tools/gn/command_gyp.cc

 // 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.
 
 #include <iostream>
 #include <map>
 #include <utility>
 #include <vector>
 
 #include "base/command_line.h"
@@ skipping 78 matching lines @@
 
   // Check that the deps match.
   if (group.debug->deps().size() != group.release->deps().size()) {
     *err = Err(Location(), "The source file count for the target\n" +
         group.debug->label().GetUserVisibleName(true) +
         "\ndoesn't have the same number of deps between the debug and "
         "release builds.");
     return false;
   }
   for (size_t i = 0; i < group.debug->deps().size(); i++) {
-    if (group.debug->deps()[i]->label() != group.release->deps()[i]->label()) {
+    if (group.debug->deps()[i].label != group.release->deps()[i].label) {
       *err = Err(Location(), "The debug and release version of the target \n" +
           group.debug->label().GetUserVisibleName(true) +
           "\ndon't agree on the dep\n" +
-          group.debug->deps()[i]->label().GetUserVisibleName(true));
+          group.debug->deps()[i].label.GetUserVisibleName(true));
       return false;
     }
   }
 
   return true;
 }
 
 // Python uses shlex.split, which we partially emulate here.
 //
 // Advances to the next "word" in a GYP_DEFINES entry. This is something
@@ skipping 265 matching lines @@
         + " GN files in " +
         base::IntToString((end_time - begin_time).InMilliseconds()) + "ms\n";
 
     OutputString(stats);
   }
 
   return 0;
 }
 
 }  // namespace commands