Limit the set of Visual Studio projects generated by GN

tools/gn/visual_studio_writer.h

Index: tools/gn/visual_studio_writer.h
diff --git a/tools/gn/visual_studio_writer.h b/tools/gn/visual_studio_writer.h
index 040922054a0e210c7164ab9ea9f343a5d247a071..3322d8167eaf04014ef6c5360db0a2795e8487df 100644
--- a/tools/gn/visual_studio_writer.h
+++ b/tools/gn/visual_studio_writer.h
@@ -28,10 +28,17 @@ class VisualStudioWriter {
     Vs2015       // Visual Studio 2015
   };
 
+  // Writes Visual Studio project and solution files. |sln_name| is the optional
+  // solution file name ("all" is used if not specified). |dir_filters| is
+  // optional semicolon-separated list of path prefixes used to limit the set of
+  // generated projects. Only targets whose directory paths start with one of
+  // specified prefixes will be included to the solution.
   // On failure will populate |err| and will return false.
   static bool RunAndWriteFiles(const BuildSettings* build_settings,
                                Builder* builder,
                                Version version,
+                               const std::string& sln_name,
+                               const std::string& dir_filters,
                                Err* err);
 
  private:
@@ -73,8 +80,7 @@ class VisualStudioWriter {
   using SolutionProjects = std::vector<SolutionProject*>;
   using SolutionFolders = std::vector<SolutionEntry*>;
 
-  explicit VisualStudioWriter(const BuildSettings* build_settings,
-                              Version version);
+  VisualStudioWriter(const BuildSettings* build_settings, Version version);
   ~VisualStudioWriter();
 
   bool WriteProjectFiles(const Target* target, Err* err);
@@ -83,7 +89,7 @@ class VisualStudioWriter {
                                 const Target* target,
                                 Err* err);
   void WriteFiltersFileContents(std::ostream& out, const Target* target);
-  bool WriteSolutionFile(Err* err);
+  bool WriteSolutionFile(const std::string& sln_name, Err* err);
   void WriteSolutionFileContents(std::ostream& out,
                                  const base::FilePath& solution_dir_path);