GN: Fix Visual Studio project build command

tools/gn/visual_studio_writer.h

 // 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.
 
 #ifndef TOOLS_GN_VISUAL_STUDIO_WRITER_H_
 #define TOOLS_GN_VISUAL_STUDIO_WRITER_H_
 
 #include <iosfwd>
 #include <string>
 #include <vector>
 
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
+#include "tools/gn/path_output.h"
 
 namespace base {
 class FilePath;
 }
 
 class Builder;
 class BuildSettings;
 class Err;
 class Target;
 
@@ skipping 60 matching lines @@
                                 Err* err);
   void WriteFiltersFileContents(std::ostream& out, const Target* target);
   bool WriteSolutionFile(Err* err);
   void WriteSolutionFileContents(std::ostream& out,
                                  const base::FilePath& solution_dir_path);
 
   // Resolves all solution folders (parent folders for projects) into |folders_|
   // and updates |root_folder_dir_|. Also sets |parent_folder| for |projects_|.
   void ResolveSolutionFolders();
 
+  std::string GetNinjaTarget(const Target* target);
+
   const BuildSettings* build_settings_;
 
   // Toolset version.
   const char* toolset_version_;
 
   // Project version.
   const char* project_version_;
 
   // Visual Studio version string.
   const char* version_string_;
@@ skipping 10 matching lines @@
 
   // Absolute root solution folder path.
   std::string root_folder_path_;
 
   // Folders for all solution projects.
   SolutionFolders folders_;
 
   // Semicolon-separated Windows SDK include directories.
   std::string windows_kits_include_dirs_;
 
+  // Path formatter for ninja targets.
+  PathOutput ninja_path_output_;
+
   DISALLOW_COPY_AND_ASSIGN(VisualStudioWriter);
 };
 
 #endif  // TOOLS_GN_VISUAL_STUDIO_WRITER_H_