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

chrome/browser/media/webrtc/webrtc_browsertest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/command_line.h"
 #include "build/build_config.h"
 #include "chrome/browser/media/webrtc/webrtc_browsertest_base.h"
 #include "chrome/browser/media/webrtc/webrtc_browsertest_common.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_tabstrip.h"
@@ skipping 201 matching lines @@
   VerifyStatsGeneratedCallback(left_tab_);
 
   DetectVideoAndHangUp();
 }
 
 IN_PROC_BROWSER_TEST_F(WebRtcBrowserTest,
                        RunsAudioVideoWebRTCCallInTwoTabsGetStatsPromise) {
   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;
   for (const std::string& type : GetWhitelistedStatsTypes(left_tab_)) {
     missing_expected_stats.insert(type);
   }
   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();
 }