Update and enable CanSetupH264VideoCallOnSupportedDevice.

- Ensure that call actually uses H264 by checking codec type in
video track stats.

- Enable CanSetupH264VideoCallOnSupportedDevice test.

Bug: webrtc:11244, 1047994
Change-Id: I5ba241828500de9e465d5200e651640394d2ce6a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2033511Reviewed-by: Guido Urdaneta <guidou@chromium.org>
Reviewed-by: Harald Alvestrand <hta@chromium.org>
Commit-Queue: Sergey Silkin <ssilkin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#742572}

content/browser/webrtc/webrtc_browsertest.cc

@@ -256,7 +256,7 @@ IN_PROC_BROWSER_TEST_F(
 // This test is to make sure HW H264 work normally on supported devices, since
 // there is no SW H264 fallback available on Android.
 IN_PROC_BROWSER_TEST_F(MAYBE_WebRtcBrowserTest,
-                       DISABLED_CanSetupH264VideoCallOnSupportedDevice) {
+                       CanSetupH264VideoCallOnSupportedDevice) {
   MakeTypicalPeerConnectionCall("CanSetupH264VideoCallOnSupportedDevice();");
 }
 #endif

content/test/data/media/peerconnection-call.html

@@ -756,17 +756,36 @@
     reportTestSuccess();
   }
 
-  function CanSetupH264VideoCallOnSupportedDevice() {
+  async function CanSetupH264VideoCallOnSupportedDevice() {
     createConnections(null);
     setOfferSdpTransform(maybePreferH264SendCodec);
-    navigator.mediaDevices.getUserMedia({audio: true, video: true})
+    navigator.mediaDevices.getUserMedia({audio: false, video: true})
         .then(addStreamToBothConnectionsAndNegotiate)
         .catch(failTest);
 
-    Promise.all([
-      detectVideoPlaying('remote-view-1'),
-      detectVideoPlaying('remote-view-1')
-    ]).then(reportTestSuccess);
+    await detectVideoPlaying('remote-view-1');
+    await detectVideoPlaying('remote-view-2');
+
+    assertEquals(gLocalStream.getVideoTracks().length, 1);
+
+    // Ensure that call uses H264.
+    gFirstConnection.getStats(gLocalStream.getVideoTracks()[0])
+        .then(function(report) {
+          var numCodecs = 0;
+          var hasH264 = false;
+          report.forEach(stats => {
+            if (stats.type == 'codec') {
+              numCodecs++;
+              if (stats.mimeType == 'video/H264') {
+                hasH264 = true;
+              }
+            }
+          });
+          assertEquals(1, numCodecs);
+          assertTrue(hasH264);
+          reportTestSuccess();
+        })
+        .catch(failTest);
   }
 
   </script>