Add mojo package manager skeleton.

mojo/tools/package_manager/unpacker.cc

Index: mojo/tools/package_manager/unpacker.cc
diff --git a/mojo/tools/package_manager/unpacker.cc b/mojo/tools/package_manager/unpacker.cc
new file mode 100644
index 0000000000000000000000000000000000000000..39f26743bac72972e11da14dfcee3f4c0fcf0694
--- /dev/null
+++ b/mojo/tools/package_manager/unpacker.cc
@@ -0,0 +1,37 @@
+// 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.
+
+#include "mojo/tools/package_manager/unpacker.h"
+
+#include "base/files/file_util.h"
+#include "base/logging.h"
+#include "third_party/zlib/google/zip.h"
+
+namespace mojo {
+
+Unpacker::Unpacker() {
+}
+
+Unpacker::~Unpacker() {
+  if (!dir_.empty()) {
+    printf("Deleting %s\n", dir_.value().c_str());
+    //DeleteFile(dir_, true);
+  }
+}
+
+bool Unpacker::Unpack(const base::FilePath& zip_file) {
+  DCHECK(zip_file_.empty());
+  zip_file_ = zip_file;
+
+  DCHECK(dir_.empty());
+  if (!CreateNewTempDirectory(base::FilePath::StringType(), &dir_))
+    return false;
+  if (!zip::Unzip(zip_file, dir_)) {
+    dir_ = base::FilePath();
+    return false;
+  }
+  return true;
+}
+
+}  // namespace mojo