Move third_party/firefox_jsshell dependency to cloud storage

DEPS

 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 vars = {
   # The dart_root is the root of our sdk checkout. This is normally
   # simply sdk, but if using special gclient specs it can be different.
   "dart_root": "sdk",
 
   # The svn location to pull out dependencies from
@@ skipping 28 matching lines @@
   "cli_util_tag" : "@0.0.1+2",
   "collection_rev": "@f6135e6350c63eb3f4dd12953b8d4363faff16fc",
   "convert_tag": "@1.0.0",
   "crypto_rev" : "@2df57a1e26dd88e8d0614207d4b062c73209917d",
   "csslib_tag" : "@0.12.0",
   "dart2js_info_rev" : "@0a221eaf16aec3879c45719de656680ccb80d8a1",
   "dartdoc_tag" : "@v0.8.4",
   "dart_services_rev" : "@7aea2574e6f3924bf409a80afb8ad52aa2be4f97",
   "dart_style_tag": "@0.2.2",
   "dev_compiler_rev": "@0.1.9",
-  "firefox_jsshell_rev" : "@45554",
   "glob_rev": "@704cf75e4f26b417505c5c611bdaacd8808467dd",
   "gsutil_rev" : "@4af393661a48e69dab038bf6440e7750ea49b085",
   "html_tag" : "@0.12.1+1",
   "http_rev" : "@9b93e1542c753090c50b46ef1592d44bc858bfe7",
   "http_multi_server_tag" : "@2.0.0",
   "http_parser_tag" : "@1.1.0",
   "http_throttle_rev" : "@a81f08be942cdd608883c7b67795c12226abc235",
   "idl_parser_rev": "@6316d5982dc24b34d09dd8b10fbeaaff28d83a48",
   "intl_rev": "@a8b480b9c436f6c0ec16730804c914bdb4e30d53",
   "jinja2_rev": "@2222b31554f03e62600cd7e383376a7c187967a1",
@@ skipping 73 matching lines @@
       Var("jinja2_rev"),
 
   Var("dart_root") + "/third_party/ply":
       Var("chromium_git") + "/chromium/src/third_party/ply.git" +
       Var("ply_rev"),
 
   Var("dart_root") + "/third_party/idl_parser":
       Var("chromium_git") + "/chromium/src/tools/idl_parser.git" +
       Var("idl_parser_rev"),
 
-  Var("dart_root") + "/third_party/firefox_jsshell":
-      Var("third_party") + "/firefox_jsshell" + Var("firefox_jsshell_rev"),
   Var("dart_root") + "/third_party/pkg/petitparser":
       Var("third_party") + "/petitparser" + Var("petitparser_rev"),
   Var("dart_root") + "/third_party/WebCore":
       Var("third_party") + "/WebCore" + Var("WebCore_rev"),
 
   Var("dart_root") + "/third_party/pkg/args":
       (Var("github_mirror") % "args") + Var("args_tag"),
   Var("dart_root") + "/third_party/pkg/async":
       (Var("github_mirror") % "async") + Var("async_tag"),
   Var("dart_root") + "/third_party/pkg/barback":
@@ skipping 195 matching lines @@
       "--bucket",
       "dart-dependencies",
       "--recursive",
       "--auto_platform",
       "--extract",
       "--directory",
       Var('dart_root') + "/tools/sdks",
     ],
   },
   {
+    "name": "firefox_jsshell",
+    "pattern": ".",
+    "action": [
+      "download_from_google_storage",
+      "--no_auth",
+      "--no_resume",
+      "--bucket",
+      "dart-dependencies",
+      "--recursive",
+      "--auto_platform",
+      "--extract",
+      "--directory",
+      Var('dart_root') + "/third_party/firefox_jsshell",
+    ],
+  },
+  {
     "name": "drt_resources",
     "pattern": ".",
     "action": [
       "download_from_google_storage",
       "--no_auth",
       "--no_resume",
       "--bucket",
       "dart-dependencies",
       "--platform=win32",
       "--directory",
       Var('dart_root') + "/third_party/drt_resources",
     ],
   },
   {
     "name": "7zip",
     "pattern": ".",
     "action": [
       "download_from_google_storage",
       "--no_auth",
       "--no_resume",
       "--bucket",
       "dart-dependencies",
       "--platform=win32",
       "--extract",
       "-s",
       Var('dart_root') + "/third_party/7zip.tar.gz.sha1",
     ],
   },
 ]