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

chrome/browser/media/webrtc/webrtc_browsertest.cc

Index: chrome/browser/media/webrtc/webrtc_browsertest.cc
diff --git a/chrome/browser/media/webrtc/webrtc_browsertest.cc b/chrome/browser/media/webrtc/webrtc_browsertest.cc
index 44b550582f25d2a259d9df0b7dfb10dd54f653fb..0b379e315643100f65489923b2bdc027f31c40c4 100644
--- a/chrome/browser/media/webrtc/webrtc_browsertest.cc
+++ b/chrome/browser/media/webrtc/webrtc_browsertest.cc
@@ -219,6 +219,8 @@ IN_PROC_BROWSER_TEST_F(WebRtcBrowserTest,
   StartServerAndOpenTabs();
   SetupPeerconnectionWithLocalStream(left_tab_);
   SetupPeerconnectionWithLocalStream(right_tab_);
+  CreateDataChannel(left_tab_, "data");
+  CreateDataChannel(right_tab_, "data");
   NegotiateCall(left_tab_, right_tab_);
 
   std::set<std::string> missing_expected_stats;
@@ -228,9 +230,9 @@ IN_PROC_BROWSER_TEST_F(WebRtcBrowserTest,
   for (const std::string& type : VerifyStatsGeneratedPromise(left_tab_)) {
     missing_expected_stats.erase(type);
   }
-  // TODO(hbos): When all stats are ready and returned by "getStats":
-  // EXPECT_TRUE(missing_expected_stats.empty());
-  // crbug.com/627816
+  for (const std::string& type : missing_expected_stats) {
+    EXPECT_TRUE(false) << "Expected stats dictionary is missing: " << type;
+  }
 
   DetectVideoAndHangUp();
 }