Add README file for WebSockets directory.

net/websockets/README

Index: net/websockets/README
diff --git a/net/websockets/README b/net/websockets/README
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index 0000000000000000000000000000000000000000..c168d9cc1c31c2e60e977096bb31a066ebedf9a3
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+This directory contains files related to Chromium's WebSocket
+implementation. See http://www.websocket.org/ for an explanation of WebSockets.
+
+As of April 2013, the contents of this directory are in a transitional state,
+and contain parts of two different WebSocket implementations.
+
+The following files are part of the legacy implementation. The legacy
+implementation performs WebSocket framing within Blink and presents a
+low-level socket-like interface to the renderer process. It is described in the
+design doc at
+https://docs.google.com/a/google.com/document/d/1_R6YjCIrm4kikJ3YeapcOU2Keqr3lVUPd-OeaIJ93qQ/preview

[tyoshino (SeeGerritForStatus), 2013/04/25 02:50:23]

Access controlled. Please find someway to make it public. You can use apps at
chromium.org too.

[Adam Rice, 2013/04/25 05:56:18]

That's strange. I assume that the doc was public when it was shared with
chromium-dev in 2009. I have made it public and verified I can view it in an
Incognito tab now.

[tyoshino (SeeGerritForStatus), 2013/04/26 09:58:14]

Oh, it's the doc I made public again a few months ago. Hmm, there might be some
timeout..?

+
+websocket_handshake_handler.cc
+websocket_handshake_handler.h
+websocket_handshake_handler_unittest.cc
+websocket_handshake_handler_spdy2_unittest.cc
+websocket_handshake_handler_spdy3_unittest.cc
+websocket_job.cc
+websocket_job.h
+websocket_job_spdy2_unittest.cc
+websocket_job_spdy3_unittest.cc
+websocket_net_log_params.cc
+websocket_net_log_params.h
+websocket_net_log_params_unittest.cc
+websocket_throttle.cc
+websocket_throttle.h
+websocket_throttle_unittest.cc
+
+The following files are part of the new implementation. The new implementation
+performs framing and implements protocol semantics in the browser process, and
+presents a high-level interface to the renderer process similar to a
+multiplexing proxy. This is not yet used in any stable Chromium version.
+
+websocket_errors.cc
+websocket_errors.h
+websocket_errors_unittest.cc
+websocket_frame.cc
+websocket_frame.h
+websocket_frame_parser.cc
+websocket_frame_parser.h
+websocket_frame_parser_unittest.cc
+websocket_frame_unittest.cc
+websocket_stream.h