MediaRecorder: disabling LayoutTests in preparation of Cr CLs and a minor update

Source/modules/mediarecorder/MediaRecorder.cpp

 // Copyright 2015 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 "config.h"
 #include "modules/mediarecorder/MediaRecorder.h"
 
 #include "core/dom/DOMError.h"
 #include "core/fileapi/Blob.h"
 #include "modules/EventModules.h"
@@ skipping 42 matching lines @@
 
 MediaRecorder::MediaRecorder(ExecutionContext* context, MediaStream* stream, const String& mimeType, ExceptionState& exceptionState)
     : ActiveDOMObject(context)
     , m_stream(stream)
     , m_mimeType(mimeType)
     , m_stopped(true)
     , m_ignoreMutedMedia(true)
     , m_state(State::Inactive)
     , m_dispatchScheduledEventRunner(this, &MediaRecorder::dispatchScheduledEvent)
 {
+    ASSERT(m_stream->getTracks().size());
+
     m_recorderHandler = adoptPtr(Platform::current()->createMediaRecorderHandler());
-
-    // TODO(mcasas): Once http://crbug.com/262211 has landed the Chromium parts,
-    // and more concretetely the createMediaRecorderHandler() implementation,
-    // ASSERT() here for |m_recorderHandler|.
+    ASSERT(m_recorderHandler);
 
     // We deviate from the spec by not returning |UnsupportedOption|, see https://github.com/w3c/mediacapture-record/issues/18
     if (!m_recorderHandler) {
         exceptionState.throwDOMException(NotSupportedError, "No MediaRecorder handler can be created.");
         return;
     }
     if (!m_recorderHandler->initialize(this, stream->descriptor(), m_mimeType)) {
         exceptionState.throwDOMException(NotSupportedError, "Failed to initialize native MediaRecorder, the type provided " + m_mimeType + "is unsupported." );
         return;
     }
@@ skipping 205 matching lines @@
 
 DEFINE_TRACE(MediaRecorder)
 {
     visitor->trace(m_stream);
     visitor->trace(m_scheduledEvents);
     RefCountedGarbageCollectedEventTargetWithInlineData<MediaRecorder>::trace(visitor);
     ActiveDOMObject::trace(visitor);
 }
 
 } // namespace blink