Basic use implementation for MediaStream from Canvas: captureStream()

third_party/WebKit/Source/core/html/canvas/CanvasDrawListener.h

Index: third_party/WebKit/Source/core/html/canvas/CanvasDrawListener.h
diff --git a/third_party/WebKit/Source/core/html/canvas/CanvasDrawListener.h b/third_party/WebKit/Source/core/html/canvas/CanvasDrawListener.h
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index 0000000000000000000000000000000000000000..2b8360f3debe8ccc8acea091950e32a9aadbc24f
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+++ b/third_party/WebKit/Source/core/html/canvas/CanvasDrawListener.h
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+// 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.
+
+#ifndef CanvasDrawListener_h
+#define CanvasDrawListener_h
+
+#include "core/CoreExport.h"
+#include "platform/heap/Handle.h"
+#include "third_party/skia/include/core/SkImage.h"
+#include "wtf/PassRefPtr.h"
+
+namespace blink {
+
+class CORE_EXPORT CanvasDrawListener : public GarbageCollectedMixin {
+public:
+    virtual ~CanvasDrawListener() {}
+    virtual bool needsNewFrameCapture() const = 0;
+    virtual void setNewFrameCapture(const WTF::PassRefPtr<SkImage>&) = 0;
+};
+
+} // namespace blink
+
+#endif