Making private tool bucket --recursive and --auto_platform.

DEPS

 # DEPS file that pulls down dependencies that are needed to build and
 # execute WebRTC specific tests from a Chromium checkout.
 
 vars = {
   'git_url':
      'https://chromium.googlesource.com'
 }
 
 deps = {
   'apprtc':
@@ skipping 68 matching lines @@
                "src/chrome/test/data/webrtc/resources"],
   },
   {
     # Download tools. If you're not a googler, you need to comment this out
     # and install the required tools yourself in the tools folder.
     "pattern": "\\.sha1",
     "action": ["download_from_google_storage",
                "--directory",
                "--num_threads=10",
                "--bucket", "chrome-webrtc-resources",
+               "--auto_platform",
+               "--recursive",
                "src/chrome/test/data/webrtc/resources/tools"],
   },
   {
     # Download firefox for the Firefox AppRTC test.
     "pattern": ".",
     "action" : ["python",
                 "webrtc.DEPS/download_firefox_nightly.py",
                 "--clean-old-firefox-archives",
                 "--target-dir",
                 "firefox-nightly"],
   },
 ]