Run unit test on Travis with a prebuilt sky_shell

engine/src/flutter/.travis.yml

@@ -1,10 +1,6 @@
 language: cpp
-sudo: required
 before_install:
   - ./travis/before_install.sh
 before_script:
   - ./travis/setup.sh
-  - export PATH=$PWD/depot_tools:$PATH
-  - export BOTO_CONFIG=$PWD/boto
-  - cd src
 script: ./travis/build.sh

engine/src/flutter/sky/tools/download_sky_shell.py

@@ -0,0 +1,37 @@
+#!/usr/bin/env python
+# Copyright 2015 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.
+
+import argparse
+import os
+import subprocess
+import sys
+
+def download(base_url, out_dir, name):
+    url = '%s/%s' % (base_url, name)
+    dst = os.path.join(out_dir, name)
+    print 'Downloading', url
+    subprocess.call([ 'curl', '-o', dst, url ])
+
+def main():
+    parser = argparse.ArgumentParser(description='Downloads sky_shell from Google storage')
+    parser.add_argument('revision_file')
+    parser.add_argument('out_dir')
+    args = parser.parse_args()
+
+    out_dir = args.out_dir
+    if not os.path.exists(out_dir):
+        os.makedirs(out_dir)
+
+    revision = None
+    with open(args.revision_file, 'r') as f:
+        revision = f.read()
+
+    base_url = 'https://storage.googleapis.com/mojo/sky/shell/linux-x64/%s' % revision
+    download(base_url, out_dir, 'sky_shell')
+    download(base_url, out_dir, 'icudtl.dat')
+    download(base_url, out_dir, 'sky_snapshot')
+
+if __name__ == '__main__':
+    sys.exit(main())