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

DEPS

Index: DEPS
diff --git a/DEPS b/DEPS
index c53c21e0df69914ac96b884b08b20254c8b2e444..546529860940c9a9f259bc64ab05a1f7e029a8c2 100644
--- a/DEPS
+++ b/DEPS
@@ -7,8 +7,6 @@ vars = {
 }
 
 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':
@@ -29,7 +27,7 @@ hooks = [
   {
     "pattern": ".",
     "action" : ["python",
-                "webrtc.DEPS/download_appengine_and_mercurial.py",
+                "webrtc.DEPS/download_apprtc_appengine_and_mercurial.py",
                 "webrtc.DEPS"],
   },
   {
@@ -39,12 +37,6 @@ hooks = [
                 "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": ".",
@@ -64,12 +56,6 @@ hooks = [
                 "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.