Added hook for downloading reference videos to the video quality test.

DEPS

Index: DEPS
===================================================================
--- DEPS	(revision 255937)
+++ DEPS	(working copy)
@@ -53,6 +53,7 @@
   },
   {
     # Download test resources, i.e. video and audio files from Google Storage.
+    # These resources are used by the Android bots.
     "pattern": "\\.sha1",
     "action": ["download_from_google_storage",
                "--directory",
@@ -62,6 +63,17 @@
                "src/resources"],
   },
   {
+    # Download video files used by the video quality browser test.
+    # (chrome/browser/media/chrome_webrtc_video_quality_browsertest.cc)
+    "pattern": "\\.sha1",
+    "action": ["download_from_google_storage",
+               "--directory",
+               "--recursive",
+               "--num_threads=10",
+               "--bucket", "chromium-webrtc-resources",
+               "webrtc.DEPS/webrtc_videos"],
+  },
+  {
     # Download firefox for the Firefox AppRTC test.
     "pattern": ".",
     "action" : ["python",