Pepper: add PPB_VideoEncoder interface

ppapi/cpp/video_encoder_client.h

Index: ppapi/cpp/video_encoder_client.h
diff --git a/ppapi/cpp/video_encoder_client.h b/ppapi/cpp/video_encoder_client.h
new file mode 100644
index 0000000000000000000000000000000000000000..3163535b7be5e9ddeea68f63675632ae484c36e7
--- /dev/null
+++ b/ppapi/cpp/video_encoder_client.h
@@ -0,0 +1,38 @@
+// 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 PPAPI_CPP_VIDEO_ENCODER_CLIENT_H_
+#define PPAPI_CPP_VIDEO_ENCODER_CLIENT_H_
+
+#include "ppapi/c/pp_resource.h"
+#include "ppapi/c/ppp_video_encoder.h"
+#include "ppapi/c/ppp_video_encoder.h"
+#include "ppapi/cpp/instance_handle.h"
+
+namespace pp {
+
+class Instance;
+class VideoEncoder;
+
+// This class provides a C++ interface for callbacks related to video encoding.
+// It is the C++ counterpart to PPP_VideoEncoder.
+// You would normally use multiple inheritance to derive from this class in your
+// instance.
+class VideoEncoderClient {
+ public:
+  VideoEncoderClient(Instance* instance);
+  virtual ~VideoEncoderClient();
+
+  // Callback to notify about bitstream buffers.
+  virtual void HandleBitstreamBuffer(
+      VideoEncoder encoder,
+      const PP_VideoEncoderBitstreamBuffer& buffer) = 0;
+
+ private:
+  InstanceHandle associated_instance_;
+};
+
+}  // namespace pp
+
+#endif  // PPAPI_CPP_VIDEO_ENCODER_CLIENT_H_