Download a prebuilt apprtc from google storage instead of building it.

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':
-    Var('git_url') + '/external/webrtc/apprtc@3168981efed7629fabee731a5ee74d3716b50652',
   'webrtc.DEPS/third_party/manifestdestiny':
     Var('git_url') + '/chromium/deps/manifestdestiny.git@46ae53ac463e23bfefec374a81806355ea598ac4',
   'webrtc.DEPS/third_party/mozdownload':
     Var('git_url') + '/chromium/deps/mozdownload.git@5d3e0bf7851b093ff9a89d45f13185691c496be',
   'webrtc.DEPS/third_party/mozinfo':
     Var('git_url') + '/chromium/deps/mozinfo.git@f4cc257e21c48bc33dc1d12123d934a4dcaa120c',
   'webrtc.DEPS/third_party/mozprocess':
     Var('git_url') + '/chromium/deps/mozprocess.git@11d11bebc8517dcedec71f377cbec07fb91a3b1f',
   'webrtc.DEPS/third_party/mozprofile':
     Var('git_url') + '/chromium/deps/mozprofile.git@313295a0d9e1687dafa58e12f1f01b093a136446',
   'webrtc.DEPS/third_party/mozrunner':
     Var('git_url') + '/chromium/deps/mozrunner.git@efb11330692424f7aa5533839b0ae728bc5f30d1',
   'webrtc.DEPS/third_party/requests/':
     Var('git_url') + '/external/github.com/kennethreitz/requests.git@2128321b85dfd969498e5d1636dcc3c4a27917ba'
 }
 
 hooks = [
   {
     "pattern": ".",
     "action" : ["python",
-                "webrtc.DEPS/download_appengine_and_mercurial.py",
+                "webrtc.DEPS/download_apprtc_appengine_and_mercurial.py",
                 "webrtc.DEPS"],
   },
   {
     "pattern": ".",
     "action" : ["python",
                 "webrtc.DEPS/download_golang.py",
                 "webrtc.DEPS"],
   },
   {
-    "pattern": ".",
-    "action" : ["python",
-                "webrtc.DEPS/download_node.py",
-                "webrtc.DEPS"],
-  },
-  {
     # "Build" AppRTC, i.e. move it to the out/ dir where the browser test
     # can find it. This is only done on runhooks.
     "pattern": ".",
     "action" : ["python",
                 "webrtc.DEPS/copy_apprtc.py"],
   },
   {
     # Build Mercurial which is needed by the golang toolchain.
     "pattern": ".",
     "action" : ["python",
                 "webrtc.DEPS/build_mercurial_local.py"],
   },
   {
     # Build AppRTC Collider using the golang toolchain.
     "pattern": ".",
     "action" : ["python",
                 "webrtc.DEPS/build_apprtc_collider.py"],
   },
   {
-    # Build the AppRTC App Engine Application.
-    "pattern": ".",
-    "action" : ["python",
-                "webrtc.DEPS/build_apprtc_appengine_app.py"],
-  },
-  {
     # Download media files and tools used by the webrtc quality browser tests,
     # chrome/browser/media/chrome_webrtc_audio_quality_browsertest.cc and
     # chrome/browser/media/chrome_webrtc_video_quality_browsertest.cc.
     "pattern": "\\.sha1",
     "action": ["download_from_google_storage",
                "--directory",
                "--num_threads=10",
                "--bucket", "chromium-webrtc-resources",
                "src/chrome/test/data/webrtc/resources"],
   },
@@ skipping 13 matching lines @@
     # Download firefox for the Firefox AppRTC test.
     # TODO(phoglund): Disabled due to http://crbug.com/545862.
     "pattern": ".",
     "action" : ["python",
                 "webrtc.DEPS/download_firefox_nightly.py",
                 "--clean-old-firefox-archives",
                 "--target-dir",
                 "firefox-nightly"],
   },
 ]