Remove mojo/tools/, not needed in chromium

mojo/tools/package_manager/manifest.h

-// Copyright 2014 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 MOJO_TOOLS_PACKAGE_MANAGER_MANIFEST_H_
-#define MOJO_TOOLS_PACKAGE_MANAGER_MANIFEST_H_
-
-#include <string>
-#include <vector>
-
-#include "mojo/public/cpp/system/macros.h"
-
-class GURL;
-
-namespace base {
-class DictionaryValue;
-class FilePath;
-}
-
-namespace mojo {
-
-class Manifest {
- public:
-  Manifest();
-  ~Manifest();
-
-  // Parses the manifest from raw data. Returns true on success. On failure,
-  // populates the "err_msg" string with an error.
-  bool Parse(const std::string& str, std::string* err_msg);
-
-  // Like Parse but reads the data from a file.
-  bool ParseFromFile(const base::FilePath& file_name, std::string* err_msg);
-
-  const std::vector<GURL>& deps() const { return deps_; }
-
- private:
-  bool PopulateDeps(const base::DictionaryValue* root, std::string* err_msg);
-
-  std::vector<GURL> deps_;
-
-  MOJO_DISALLOW_COPY_AND_ASSIGN(Manifest);
-};
-
-}  // namespace mojo
-
-#endif  // MOJO_TOOLS_PACKAGE_MANAGER_MANIFEST_H_