Adding support for AppRTC closure compiling.

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 = {
   'webrtc-samples':
@@ skipping 19 matching lines @@
                 "webrtc.DEPS/download_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 AppRTC closure Javascript.
+    "pattern": ".",
+    "action" : ["python",
+                "webrtc.DEPS/build_apprtc_closure.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"],
   },
   {
     # 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",
                "src/chrome/test/data/webrtc/resources/tools"],
   },
   {
     # Download firefox for the Firefox AppRTC test.
     "pattern": ".",
     "action" : ["python",
                 "webrtc.DEPS/download_firefox_nightly.py",
                 "-t",
                 "firefox-nightly"],
   },
 ]