MediaRecorder: make MediaRecorderHandler a MediaStreamObserver

content/shell/renderer/layout_test/blink_test_runner.cc

 // Copyright (c) 2012 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 "content/shell/renderer/layout_test/blink_test_runner.h"
 
 #include <algorithm>
 #include <clocale>
 #include <cmath>
 
@@ skipping 35 matching lines @@
 #include "content/shell/common/shell_switches.h"
 #include "content/shell/renderer/layout_test/blink_test_helpers.h"
 #include "content/shell/renderer/layout_test/layout_test_render_process_observer.h"
 #include "content/shell/renderer/layout_test/leak_detector.h"
 #include "media/audio/audio_parameters.h"
 #include "net/base/filename_util.h"
 #include "net/base/net_errors.h"
 #include "skia/ext/platform_canvas.h"
 #include "third_party/WebKit/public/platform/Platform.h"
 #include "third_party/WebKit/public/platform/WebCString.h"
+#include "third_party/WebKit/public/platform/WebMediaStream.h"
 #include "third_party/WebKit/public/platform/WebPoint.h"
 #include "third_party/WebKit/public/platform/WebRect.h"
 #include "third_party/WebKit/public/platform/WebSize.h"
 #include "third_party/WebKit/public/platform/WebString.h"
 #include "third_party/WebKit/public/platform/WebTaskRunner.h"
 #include "third_party/WebKit/public/platform/WebThread.h"
 #include "third_party/WebKit/public/platform/WebTraceLocation.h"
 #include "third_party/WebKit/public/platform/WebURL.h"
 #include "third_party/WebKit/public/platform/WebURLError.h"
 #include "third_party/WebKit/public/platform/WebURLRequest.h"
@@ skipping 716 matching lines @@
   DCHECK(stream);
 #if defined(ENABLE_WEBRTC)
   return AddAudioTrackToMediaStream(
       make_scoped_refptr(new MockAudioCapturerSource()),
       false /* is_remote */, false /* is_readonly */, stream);
 #else
   return false;
 #endif
 }
 
+void BlinkTestRunner::AddMediaStream(blink::WebMediaStream* stream) {
+  DCHECK(stream);
+#if defined(ENABLE_WEBRTC)
+  AddMediaStreamTowebMediaStream(stream);

[mcasas, 2016/01/08 00:14:12]

So just to confirm, at this point I cannot just do
stream->setExtraData(new content::MediaStream());
because here I can only depend on content/public
and MediaStream is in content/renderer/media.

Actually it would be possible to move media_stream.{cc,h} 
to content/public/renderer, but I don't think is worth
for testing infrastructure, and would increase the
public API surface of content...

+#endif
+}
+
 // RenderViewObserver  --------------------------------------------------------
 
 void BlinkTestRunner::DidClearWindowObject(WebLocalFrame* frame) {
   WebTestingSupport::injectInternalsObject(frame);
   LayoutTestRenderProcessObserver::GetInstance()->test_interfaces()->BindTo(
       frame);
 }
 
 bool BlinkTestRunner::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
@@ skipping 193 matching lines @@
   get_bluetooth_events_callbacks_.pop_front();
   callback.Run(events);
 }
 
 void BlinkTestRunner::ReportLeakDetectionResult(
     const LeakDetectionResult& report) {
   Send(new ShellViewHostMsg_LeakDetectionDone(routing_id(), report));
 }
 
 }  // namespace content