Add video frame recording capability to Chromoting hosts.

remoting/host/video_frame_recorder_host_extension.h

Index: remoting/host/video_frame_recorder_host_extension.h
diff --git a/remoting/host/video_frame_recorder_host_extension.h b/remoting/host/video_frame_recorder_host_extension.h
new file mode 100644
index 0000000000000000000000000000000000000000..de57b203616955c9baad79dc07220b3df7e52bd5
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+++ b/remoting/host/video_frame_recorder_host_extension.h
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+// Copyright 2014 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 REMOTING_HOST_VIDEO_FRAME_RECORDER_HOST_EXTENSION_H_
+#define REMOTING_HOST_VIDEO_FRAME_RECORDER_HOST_EXTENSION_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "remoting/host/host_extension.h"
+
+namespace remoting {
+
+// Extends Chromoting sessions with the ability to record raw frames and
+// download them to the client. This can be used to obtain representative
+// sequences of frames to run tests against.
+class VideoFrameRecorderHostExtension : public HostExtension {
+ public:
+  VideoFrameRecorderHostExtension() {}
+  virtual ~VideoFrameRecorderHostExtension() {}
+
+  // Sets the maximum number of bytes that each session may record.
+  void SetMaxContentBytes(int64_t max_content_bytes);
+
+  // remoting::HostExtension interface.
+  virtual std::string GetCapabilities() OVERRIDE;
+  virtual scoped_ptr<HostExtensionSession> CreateExtensionSession(
+      ClientSession* client_session) OVERRIDE;
+
+ private:
+  int64_t max_content_bytes_;
+
+  DISALLOW_COPY_AND_ASSIGN(VideoFrameRecorderHostExtension);
+};
+
+}  // namespace remoting
+
+#endif  // REMOTING_HOST_VIDEO_FRAME_RECORDER_HOST_EXTENSION_H_