VideoCapture: Remove deep frame copy in the border to libJingle

media/base/video_frame.h

Index: media/base/video_frame.h
diff --git a/media/base/video_frame.h b/media/base/video_frame.h
index 928550cbd0724b2624f164970d8763e81f9207e6..1eb974d1928f58709198f5a91a5f1a71e465f7ef 100644
--- a/media/base/video_frame.h
+++ b/media/base/video_frame.h
@@ -265,7 +265,13 @@ class MEDIA_EXPORT VideoFrame : public base::RefCountedThreadSafe<VideoFrame> {
 
   // Returns pointer to the buffer for a given plane. The memory is owned by
   // VideoFrame object and must not be freed by the caller.
-  uint8* data(size_t plane) const;
+  const uint8* data(size_t plane) const;
+  uint8* data(size_t plane);
+
+  // Returns pointer to the visible region specified by visible_rect(). The
+  // memory is owned by VideoFrame object and must not be freed by the caller.
+  const uint8* visible_data(size_t plane) const;
+  uint8* visible_data(size_t plane);
 
   // Returns the mailbox holder of the native texture wrapped by this frame.
   // Only valid to call if this is a NATIVE_TEXTURE frame. Before using the