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diff --git a/ppapi/cpp/private/video_source_private.h b/ppapi/cpp/private/video_source_private.h
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+// Copyright (c) 2013 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 PPAPI_CPP_PRIVATE_VIDEO_SOURCE_PRIVATE_H_
+#define PPAPI_CPP_PRIVATE_VIDEO_SOURCE_PRIVATE_H_
+
+#include <string>
+
+#include "ppapi/c/pp_time.h"
+#include "ppapi/cpp/completion_callback.h"
+#include "ppapi/cpp/pass_ref.h"
+#include "ppapi/cpp/resource.h"
+
+/// @file
+/// This file defines the <code>PPB_VideoSource_Private</code> interface for a
+/// video source resource, which receives video frames from a MediaStream video
+/// track in the browser.
+
+namespace pp {
+
+class InstanceHandle;
+class VideoFrame_Private;
+
+/// The <code>VideoSource_Private</code> class contains methods for creating
+/// video source resources and using them to receive video frames from a
+/// MediaStream video track in the browser.
+class VideoSource_Private : public Resource {
+ public:
+  /// Default constructor for creating a <code>VideoSource_Private</code>
+  /// object.
+  VideoSource_Private();
+
+  /// Constructor for creating a <code>VideoSource_Private</code> for an
+  /// instance.
+  explicit VideoSource_Private(const InstanceHandle& instance);
+
+  /// The copy constructor for <code>VideoSource_Private</code>.
+  ///
+  /// @param[in] other A reference to a <code>VideoSource_Private</code>.
+  VideoSource_Private(const VideoSource_Private& other);
+
+  /// A constructor used when you have received a PP_Resource as a return
+  /// value that has had its reference count incremented for you.
+  ///
+  /// @param[in] resource A PP_Resource corresponding to a video source.
+  VideoSource_Private(PassRef, PP_Resource resource);
+
+  /// Opens a video source for getting frames.
+  ///
+  /// @param[in] stream_url A <code>Var</code> string holding a URL identifying
+  /// a MediaStream.
+  /// @param[in] callback A <code>CompletionCallback</code> to be called upon
+  /// completion of Open().
+  ///
+  /// @return An int32_t containing a result code from <code>pp_errors.h</code>.
+  /// Returns PP_ERROR_BADRESOURCE if source isn't a valid video source.
+  /// Returns PP_ERROR_INPROGRESS if source is already open.
+  /// Returns PP_ERROR_FAILED if the MediaStream doesn't exist or if there is
+  /// some other browser error.
+  int32_t Open(const Var& stream_url,
+               const CompletionCallback& cc);
+
+  /// Gets a frame from the video source.
+  ///
+  /// @param[out] frame A <code>VideoFrame_Private</code> to hold a video
+  /// frame from the source.
+  /// @param[in] callback A <code>CompletionCallbackWithOutput</code> to be
+  /// called upon completion of ReceiveFrame().
+  ///
+  /// @return An int32_t containing a result code from <code>pp_errors.h</code>.
+  /// Returns PP_ERROR_BADRESOURCE if source isn't a valid video source.
+  /// Returns PP_ERROR_FAILED if the source is not open, or if some other
+  /// browser error occurs.
+  int32_t GetFrame(
+      const CompletionCallbackWithOutput<VideoFrame_Private>& cc);
+
+  /// Closes the video source.
+  void Close();
+};
+
+}  // namespace pp
+
+#endif  // PPAPI_CPP_PRIVATE_VIDEO_SOURCE_PRIVATE_H_