GN threading refactor

tools/gn/gyp_target_writer.h

 // 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.
 
 #ifndef TOOLS_GN_GYP_TARGET_WRITER_H_
 #define TOOLS_GN_GYP_TARGET_WRITER_H_
 
 #include <iosfwd>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "tools/gn/gyp_helper.h"
 
+class BuilderRecord;
 class Err;
 class Settings;
 class SourceFile;
 class Target;
 
 class GypTargetWriter {
  public:
   struct TargetGroup {
     TargetGroup()
         : debug(NULL),
           release(NULL),
           host_debug(NULL),
           host_release(NULL) {
     }
-    const Target* debug;
-    const Target* release;
-    const Target* host_debug;
-    const Target* host_release;
+    const BuilderRecord* debug;
+    const BuilderRecord* release;
+    const BuilderRecord* host_debug;
+    const BuilderRecord* host_release;
   };
 
   GypTargetWriter(const Target* target, std::ostream& out);
   virtual ~GypTargetWriter();
 
   static void WriteFile(const SourceFile& gyp_file,
                         const std::vector<TargetGroup>& targets,
                         Err* err);
 
   virtual void Run() = 0;
 
  protected:
   const Settings* settings_;  // Non-owning.
   const Target* target_;  // Non-owning.
   std::ostream& out_;
 
   GypHelper helper_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(GypTargetWriter);
 };
 
 #endif  // TOOLS_GN_GYP_TARGET_WRITER_H_