[PPAPI][MediaStream] Support configure for video input.

ppapi/shared_impl/media_stream_video_track_shared.h

Index: ppapi/shared_impl/media_stream_video_track_shared.h
diff --git a/ppapi/shared_impl/media_stream_video_track_shared.h b/ppapi/shared_impl/media_stream_video_track_shared.h
new file mode 100644
index 0000000000000000000000000000000000000000..75e32b8ed4014db241062662788a7a15730f4e40
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+++ b/ppapi/shared_impl/media_stream_video_track_shared.h
@@ -0,0 +1,32 @@
+// 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 PPAPI_SHARED_IMPL_MEDIA_STREAM_VIDEO_TRACK_SHARED_H_
+#define PPAPI_SHARED_IMPL_MEDIA_STREAM_VIDEO_TRACK_SHARED_H_
+
+#include "ppapi/c/ppb_video_frame.h"
+#include "ppapi/shared_impl/ppapi_shared_export.h"
+
+namespace ppapi {
+
+class PPAPI_SHARED_EXPORT MediaStreamVideoTrackShared {
+ public:
+  struct Attributes {
+    Attributes()
+        : buffers(0),
+          width(0),
+          height(0),
+          format(PP_VIDEOFRAME_FORMAT_UNKNOWN) {}
+    int32_t buffers;
+    int32_t width;
+    int32_t height;
+    PP_VideoFrame_Format format;
+  };
+
+  static bool VerifyAttributes(const Attributes& attributes);
+};
+
+}  // namespace ppapi
+
+#endif  // PPAPI_SHARED_IMPL_MEDIA_STREAM_VIDEO_TRACK_SHARED_H_