Make rendering of MediaStreams reflect changes to its set of tracks.

content/browser/webrtc/webrtc_getusermedia_browsertest.cc

 // Copyright 2014 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 <stddef.h>
 
 #include "base/command_line.h"
 #include "base/feature_list.h"
 #include "base/json/json_reader.h"
 #include "base/memory/ref_counted_memory.h"
@@ skipping 1497 matching lines @@
             ExecuteJavascriptAndReturnResult(
                 "failTestAfterTimeout('Got no unmute event', 1500);"));
 
   // Mute
   media::FakeAudioInputStream::SetGlobalMutedState(true);
   EXPECT_EQ("onmute: muted=true, readyState=live",
             ExecuteJavascriptAndReturnResult(
                 "failTestAfterTimeout('Got no mute event', 1500);"));
 }
 
+IN_PROC_BROWSER_TEST_F(WebRtcGetUserMediaBrowserTest, SrcObjectAddVideoTrack) {
+  ASSERT_TRUE(embedded_test_server()->Start());
+  GURL url(embedded_test_server()->GetURL("/media/getusermedia.html"));
+  NavigateToURL(shell(), url);
+  ExecuteJavascriptAndWaitForOk("srcObjectAddVideoTrack()");
+}
+
+IN_PROC_BROWSER_TEST_F(WebRtcGetUserMediaBrowserTest,
+                       SrcObjectRemoveVideoTrack) {
+  ASSERT_TRUE(embedded_test_server()->Start());
+  GURL url(embedded_test_server()->GetURL("/media/getusermedia.html"));
+  NavigateToURL(shell(), url);
+  ExecuteJavascriptAndWaitForOk("srcObjectRemoveVideoTrack()");
+}
+
+// TODO(guidou): Add SrcObjectAddAudioTrack and SrcObjectRemoveAudioTrack when
+// a straightforward mechanism to detect the presence/absence of audio in a
+// media element with an assigned MediaStream becomes available.
+
 }  // namespace content