AudioRendererImpl: Don't advance time when rendering stops.

third_party/WebKit/LayoutTests/http/tests/media/video-play-stall.html

Index: third_party/WebKit/LayoutTests/http/tests/media/video-play-stall.html
diff --git a/third_party/WebKit/LayoutTests/http/tests/media/video-play-stall.html b/third_party/WebKit/LayoutTests/http/tests/media/video-play-stall.html
index 0e99c95e121e08398605b5734cc246fd24fcdab8..8ab9dcf78669a52761b5c3762889b7b2333ec0e2 100644
--- a/third_party/WebKit/LayoutTests/http/tests/media/video-play-stall.html
+++ b/third_party/WebKit/LayoutTests/http/tests/media/video-play-stall.html
@@ -11,12 +11,16 @@ async_test(t => {
     let log_console = document.getElementById('log_console');
 
     // For debugging.
-    function logEvent(e) {
+    function logMessage(msg) {
         let span = document.createElement("span");
-        span.innerHTML = 'event: ' + e.type + '<br>';
+        span.innerHTML = msg + '<br>';
         log_console.appendChild(span);
     };
 
+    function logEvent(e) {
+        logMessage('event: ' + e.type);
+    };
+
     playback_ew = new EventWatcher(t, video, [
         'canplay',
         'canplaythrough',
@@ -46,6 +50,25 @@ async_test(t => {
         return promise;
     }
 
+    // Monitor timeupdate w.r.t. readyState throughout test. Time should not
+    // advance while readyState <= HAVE_CURRENT_DATA.
+    let timeAtStartOfWaiting = null;
+    video.addEventListener('timeupdate', t.step_func(function(e) {
+        logMessage('event: timeupdate at time: ' + e.target.currentTime +'  readystate:' + e.target.readyState);
+        if (e.target.readyState <= HTMLMediaElement.HAVE_CURRENT_DATA) {
+            if (timeAtStartOfWaiting == null) {
+                // Note the time when waiting begins.
+                timeAtStartOfWaiting = e.target.currentTime;
+            } else {
+                // Verify that current time is not advancing while waiting.
+                assert_equals(e.target.currentTime, timeAtStartOfWaiting);
+            }
+        } else if (timeAtStartOfWaiting != null) {
+            // Waiting has ended, so clear timeAtStartOfWaiting.
+            timeAtStartOfWaiting = null;
+        }
+     }));
+
     // NOTE: Event sequence verification is achieved by chaining together
     // promises via then(). To verify separate parallel event sequences (e.g.
     // playback vs network), we setup separate chains of promises. Promise.all
@@ -73,7 +96,7 @@ async_test(t => {
             // Now observe waiting event and verify readyState
             .then(() => playback_ew.wait_for('waiting')).then(logEvent)
             .then(t.step_func(function(){
-                assert_equals(HTMLMediaElement.HAVE_CURRENT_DATA, video.readyState);
+                assert_equals(video.readyState, HTMLMediaElement.HAVE_CURRENT_DATA);
             })),
 
         // timeupdate should fire throughout playback. Make sure we see one.