Make sure VS projects order is always the same in solution

tools/gn/visual_studio_writer.cc

 // Copyright 2016 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 "tools/gn/visual_studio_writer.h"
 
 #include <algorithm>
 #include <map>
 #include <set>
 #include <string>
@@ skipping 218 matching lines @@
       return false;
 
     processed_targets.insert(target_path);
   }
 
   if (writer.projects_.empty()) {
     *err = Err(Location(), "No Visual Studio projects generated.");
     return false;
   }
 
+  // Sort projects so they appear always in the same order in solution file.
+  // Otherwise solution file is rewritten and reloaded by Visual Studio.
+  std::sort(writer.projects_.begin(), writer.projects_.end(),
+            [](const SolutionEntry* a, const SolutionEntry* b) {
+              return a->path < b->path;
+            });
+
   writer.ResolveSolutionFolders();
   return writer.WriteSolutionFile(err);
 }
 
 bool VisualStudioWriter::WriteProjectFiles(const Target* target, Err* err) {
   SourceFile target_file = GetTargetOutputDir(target).ResolveRelativeFile(
       Value(nullptr, target->label().name() + ".vcxproj"), err);
   if (target_file.is_null())
     return false;
 
@@ skipping 496 matching lines @@
                            base::CompareCase::SENSITIVE)) {
         folder->parent_folder = parents.back();
         break;
       } else {
         parents.pop_back();
       }
     }
     parents.push_back(folder);
   }
 }