Reland of "WebRtcBrowserTest: Include all stats in getStats."

chrome/test/data/webrtc/peerconnection.js

Index: chrome/test/data/webrtc/peerconnection.js
diff --git a/chrome/test/data/webrtc/peerconnection.js b/chrome/test/data/webrtc/peerconnection.js
index e3f822bebdcc1ea4d62d2f01cbd6b1e5dac9eb92..46d57a5c4f6096fb62729b1750f568702c7d085e 100644
--- a/chrome/test/data/webrtc/peerconnection.js
+++ b/chrome/test/data/webrtc/peerconnection.js
@@ -100,6 +100,15 @@ function forceVideoCodec(videoCodec) {
 }
 
 /**
+ * Creates a data channel with the specified label.
+ * Returns 'ok-created' to test.
+ */
+function createDataChannel(label) {
+  peerConnection_().createDataChannel(label);
+  returnToTest('ok-created');
+}
+
+/**
  * Asks this page to create a local offer.
  *
  * Returns a string on the format ok-(JSON encoded session description).