Convert //tools to use std::unique_ptr

tools/gn/test_with_scope.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_TEST_WITH_SCOPE_H_
 #define TOOLS_GN_TEST_WITH_SCOPE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 74 matching lines @@
   const Err& parse_err() const { return parse_err_; }
 
   const InputFile& input_file() const { return input_file_; }
   const std::vector<Token>& tokens() const { return tokens_; }
   const ParseNode* parsed() const { return parsed_.get(); }
 
  private:
   InputFile input_file_;
 
   std::vector<Token> tokens_;
-  scoped_ptr<ParseNode> parsed_;
+  std::unique_ptr<ParseNode> parsed_;
 
   Err parse_err_;
 
   DISALLOW_COPY_AND_ASSIGN(TestParseInput);
 };
 
 // Shortcut for creating targets for tests that take the test setup, a pretty-
 // style label, and a target type and sets everything up. The target will
 // default to public visibility.
 class TestTarget : public Target {
  public:
   TestTarget(const TestWithScope& setup,
              const std::string& label_string,
              Target::OutputType type);
   ~TestTarget() override;
 };
 
 #endif  // TOOLS_GN_TEST_WITH_SCOPE_H_