Create CanvasCaptureMediaStreamTrack in a regular MediaStream

content/renderer/renderer_blink_platform_impl.h

 // 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.
 
 #ifndef CONTENT_RENDERER_RENDERER_BLINK_PLATFORM_IMPL_H_
 #define CONTENT_RENDERER_RENDERER_BLINK_PLATFORM_IMPL_H_
 
 #include "base/compiler_specific.h"
 #include "base/id_map.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 128 matching lines @@
   void sampleGamepads(blink::WebGamepads&) override;
   blink::WebRTCPeerConnectionHandler* createRTCPeerConnectionHandler(
       blink::WebRTCPeerConnectionHandlerClient* client) override;
   blink::WebRTCCertificateGenerator* createRTCCertificateGenerator() override;
   blink::WebMediaRecorderHandler* createMediaRecorderHandler() override;
   blink::WebMediaStreamCenter* createMediaStreamCenter(
       blink::WebMediaStreamCenterClient* client) override;
   blink::WebCanvasCaptureHandler* createCanvasCaptureHandler(
       const blink::WebSize& size,
       double frame_rate,
-      blink::WebMediaStream* stream) override;
+      blink::WebMediaStreamTrack* track) override;
   blink::WebGraphicsContext3D* createOffscreenGraphicsContext3D(
       const blink::WebGraphicsContext3D::Attributes& attributes) override;
   blink::WebGraphicsContext3D* createOffscreenGraphicsContext3D(
       const blink::WebGraphicsContext3D::Attributes& attributes,
       blink::WebGraphicsContext3D* share_context) override;
   blink::WebGraphicsContext3D* createOffscreenGraphicsContext3D(
       const blink::WebGraphicsContext3D::Attributes& attributes,
       blink::WebGraphicsContext3D* share_context,
       blink::WebGraphicsContext3D::WebGraphicsInfo* gl_info) override;
   blink::WebGraphicsContext3DProvider*
@@ skipping 122 matching lines @@
   IDMap<PlatformEventObserverBase, IDMapOwnPointer> platform_event_observers_;
 
   scheduler::RendererScheduler* renderer_scheduler_;  // NOT OWNED
 
   DISALLOW_COPY_AND_ASSIGN(RendererBlinkPlatformImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDERER_BLINK_PLATFORM_IMPL_H_