GN: Use build directory for CD for scripts

tools/gn/scope_per_file_provider.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_SCOPE_PER_FILE_PROVIDER_H_
 #define TOOLS_GN_SCOPE_PER_FILE_PROVIDER_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "tools/gn/scope.h"
 #include "tools/gn/source_file.h"
 
 // ProgrammaticProvider for a scope to provide it with per-file built-in
 // variable support.
 class ScopePerFileProvider : public Scope::ProgrammaticProvider {
  public:
   ScopePerFileProvider(Scope* scope);
   virtual ~ScopePerFileProvider();
 
   // ProgrammaticProvider implementation.
   virtual const Value* GetProgrammaticValue(
       const base::StringPiece& ident) OVERRIDE;
 
  private:
   const Value* GetCurrentToolchain();
   const Value* GetDefaultToolchain();
   const Value* GetPythonPath();
-  const Value* GetRelativeBuildToSourceRootDir();
-  const Value* GetRelativeRootOutputDir();
-  const Value* GetRelativeRootGenDir();
-  const Value* GetRelativeSourceRootDir();
-  const Value* GetRelativeTargetOutputDir();
-  const Value* GetRelativeTargetGenDir();
   const Value* GetRootGenDir();
+  const Value* GetRootOutDir();
   const Value* GetTargetGenDir();
+  const Value* GetTargetOutDir();
 
   static std::string GetRootOutputDirWithNoLastSlash(const Settings* settings);
   static std::string GetRootGenDirWithNoLastSlash(const Settings* settings);
 
   std::string GetFileDirWithNoLastSlash() const;
-  std::string GetRelativeRootWithNoLastSlash() const;
-
-  // Inverts the given directory, returning it with no trailing slash. If the
-  // result would be empty, "." is returned to indicate the current dir.
-  static std::string InvertDirWithNoLastSlash(const SourceDir& dir);
 
   // All values are lazily created.
   scoped_ptr<Value> current_toolchain_;
   scoped_ptr<Value> default_toolchain_;
   scoped_ptr<Value> python_path_;
-  scoped_ptr<Value> relative_build_to_source_root_dir_;
-  scoped_ptr<Value> relative_root_output_dir_;
-  scoped_ptr<Value> relative_root_gen_dir_;
-  scoped_ptr<Value> relative_source_root_dir_;
-  scoped_ptr<Value> relative_target_output_dir_;
-  scoped_ptr<Value> relative_target_gen_dir_;
   scoped_ptr<Value> root_gen_dir_;
+  scoped_ptr<Value> root_out_dir_;
   scoped_ptr<Value> target_gen_dir_;
+  scoped_ptr<Value> target_out_dir_;
 
   DISALLOW_COPY_AND_ASSIGN(ScopePerFileProvider);
 };
 
 #endif  // TOOLS_GN_SCOPE_PER_FILE_PROVIDER_H_