Revert of Reduce ActiveDOMObjects from modules/mediastream/

third_party/WebKit/Source/modules/mediacapturefromelement/CanvasCaptureMediaStreamTrack.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 "modules/mediacapturefromelement/CanvasCaptureMediaStreamTrack.h"
 
 #include "core/html/HTMLCanvasElement.h"
 #include "modules/mediacapturefromelement/AutoCanvasDrawListener.h"
 #include "modules/mediacapturefromelement/OnRequestCanvasDrawListener.h"
 #include "modules/mediacapturefromelement/TimedCanvasDrawListener.h"
@@ skipping 35 matching lines @@
     visitor->trace(m_canvasElement);
     visitor->trace(m_drawListener);
     MediaStreamTrack::trace(visitor);
 }
 
 CanvasCaptureMediaStreamTrack::CanvasCaptureMediaStreamTrack(const CanvasCaptureMediaStreamTrack& track, MediaStreamComponent* component)
     :MediaStreamTrack(track.m_canvasElement->executionContext(), component)
     , m_canvasElement(track.m_canvasElement)
     , m_drawListener(track.m_drawListener)
 {
+    suspendIfNeeded();
     m_canvasElement->addListener(m_drawListener.get());
 }
 
 CanvasCaptureMediaStreamTrack::CanvasCaptureMediaStreamTrack(MediaStreamComponent* component, PassRefPtrWillBeRawPtr<HTMLCanvasElement> element, const PassOwnPtr<WebCanvasCaptureHandler> handler)
     : MediaStreamTrack(element->executionContext(), component)
     , m_canvasElement(element)
 {
+    suspendIfNeeded();
     m_drawListener = AutoCanvasDrawListener::create(handler);
     m_canvasElement->addListener(m_drawListener.get());
 }
 
 CanvasCaptureMediaStreamTrack::CanvasCaptureMediaStreamTrack(MediaStreamComponent* component, PassRefPtrWillBeRawPtr<HTMLCanvasElement> element, const PassOwnPtr<WebCanvasCaptureHandler> handler, double frameRate)
     : MediaStreamTrack(element->executionContext(), component)
     , m_canvasElement(element)
 {
+    suspendIfNeeded();
     if (frameRate == 0) {
         m_drawListener = OnRequestCanvasDrawListener::create(handler);
     } else {
         m_drawListener = TimedCanvasDrawListener::create(handler, frameRate);
     }
     m_canvasElement->addListener(m_drawListener.get());
 }
 
 } // namespace blink