Add unzip.js instead of using 7za.exe. It greatly reduces the depot_tools.zip...

bootstrap/win/unzip.js

+// Copyright (c) 2009 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.
+
+function Unzip(file, path, verbose) {
+  if (verbose) {
+    WScript.StdOut.Write(" *  UNZIP " + file);
+  }
+  var shell_app;
+  var fso;
+  try {
+    shell_app = new ActiveXObject("Shell.Application");
+    fso = new ActiveXObject("Scripting.FileSystemObject");
+  } catch (e) {
+    WScript.StdOut.WriteLine("[-] OBJECTS " + new Number(e.number).toHex() + 
+        ": Cannot create Active-X object (" + e.description) + ").";
+    WScript.Quit(1);
+  }
+  // shell_app.Namespace() doesn't work with relative paths.
+  //current_dir = fso.GetFolder('.').Path + '\\'
+  //path = current_dir + path
+  //file = current_dir + file
+  var out;
+  var zip;
+  try {
+    if (!fso.FolderExists(path)) {
+      fso.CreateFolder(path);
+    }
+    out = shell_app.Namespace(path);
+  } catch (e) {
+    WScript.StdOut.WriteLine("[-] SHELL.APPLICATION " +
+        new Number(e.number).toHex() + 
+        ": Failed to open output directory.");
+    WScript.Quit(1);
+  }
+  if (!out) {
+    WScript.StdOut.WriteLine("[-] SHELL.APPLICATION : Failed to open output directory.");
+    WScript.Quit(1);
+  }
+
+  try {
+    zip = shell_app.Namespace(file);
+  } catch (e) {
+    WScript.StdOut.WriteLine("[-] SHELL.APPLICATION " +
+        new Number(e.number).toHex() + 
+        ": Failed to open zip file.");
+    WScript.Quit(1);
+  }
+  if (!zip) {
+    WScript.StdOut.WriteLine("[-] SHELL.APPLICATION " +
+        ": Failed to open zip file.");
+    WScript.Quit(1);
+  }
+
+  try {
+    out.CopyHere(zip.Items());
+  } catch (e) {
+    WScript.StdOut.WriteLine("[-] SHELL.APPLICATION " +
+        new Number(e.number).toHex() + 
+        ": Failed to extract.");
+    WScript.Quit(1);
+  }
+  if (verbose) {
+    WScript.StdOut.WriteLine("ok.");
+  }
+}
+
+// Utilities
+Number.prototype.isInt = function NumberIsInt() {
+  return this % 1 == 0; 
+};
+Number.prototype.toHex = function NumberToHex(length) {
+  if (arguments.length == 0) length = 1;
+  if (typeof(length) != "number" && !(length instanceof Number)) {
+    throw Exception("Length must be a positive integer larger than 0.", 
+        TypeError, 0);
+  }
+  if (length < 1 || !length.isInt()) {
+    throw Exception("Length must be a positive integer larger than 0.", 
+        "RangeError", 0);
+  }
+  var result = (this + (this < 0 ? 0x100000000 : 0)).toString(16);
+  while (result.length < length) result = "0" + result;
+  return result;
+};
+
+if (WScript.Arguments.length != 2) {
+  WScript.StdOut.Write("Incorrect arguments to unzip.js")
+} else {
+  Unzip(WScript.Arguments(0), WScript.Arguments(1), false);
+}