Revert of Include class relationship diagrams in network stack documentation.

net/net.gypi

 # 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.
 
 # This file is shared between the regular GYP build, the NaCl GYP build, and
 # the GN build. For GN support, it must have no conditionals or anything like
 # that beyond the simple one-level-deep dictionary of values.
 {
   'variables': {
     # Subset of net source files that are compiled for NaCl (net_nacl target).
@@ skipping 1991 matching lines @@
       "websockets/websocket_handshake_response_info.h",
       "websockets/websocket_handshake_stream_base.h",
       "websockets/websocket_handshake_stream_create_helper.cc",
       "websockets/websocket_handshake_stream_create_helper.h",
       "websockets/websocket_inflater.cc",
       "websockets/websocket_inflater.h",
       "websockets/websocket_mux.h",
       "websockets/websocket_stream.cc",
       "websockets/websocket_stream.h",
     ],
+    'net_docs_script': 'tools/net_docs/net_docs.py',
+    'net_docs_sources': [
+      'README.md',
+      'docs/bug-triage.md',
+      'docs/bug-triage-labels.md',
+      'docs/bug-triage-suggested-workflow.md',
+      'docs/code-patterns.md',
+      'docs/crash-course-in-net-internals.md',
+      'docs/life-of-a-url-request.md',
+      'sdch/README.md',
+    ],
+    'net_docs_output_dir': '<(PRODUCT_DIR)/net/docs',
   }
 }