Restructure SDCH layering to allow more separation (observer/1->[0,n]

chrome/chrome_browser.gypi

 # Copyright 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.
 
 {
   'variables': {
     # All .cc, .h, .m, and .mm files under browser except for:
     # * tests and mocks.
     # * code below browser/chromeos
     # * code below browser/extensions
@@ skipping 700 matching lines @@
       'browser/net/chrome_extensions_network_delegate.cc',
       'browser/net/chrome_extensions_network_delegate.h',
       'browser/net/chrome_fraudulent_certificate_reporter.cc',
       'browser/net/chrome_fraudulent_certificate_reporter.h',
       'browser/net/chrome_http_user_agent_settings.cc',
       'browser/net/chrome_http_user_agent_settings.h',
       'browser/net/chrome_net_log.cc',
       'browser/net/chrome_net_log.h',
       'browser/net/chrome_network_delegate.cc',
       'browser/net/chrome_network_delegate.h',
+      'browser/net/chrome_sdch_policy.cc',
+      'browser/net/chrome_sdch_policy.h',
       'browser/net/chrome_url_request_context_getter.cc',
       'browser/net/chrome_url_request_context_getter.h',
       'browser/net/client_hints.cc',
       'browser/net/client_hints.h',
       'browser/net/connect_interceptor.cc',
       'browser/net/connect_interceptor.h',
       'browser/net/connection_tester.cc',
       'browser/net/connection_tester.h',
       'browser/net/cookie_store_util.cc',
       'browser/net/cookie_store_util.h',
@@ skipping 2855 matching lines @@
           'variables': {
             'proto_in_dir': 'browser/sync_file_system/drive_backend',
             'proto_out_dir': 'chrome/browser/sync_file_system/drive_backend',
           },
           'includes': [ '../build/protoc.gypi' ]
         },
       ],
     },],
   ],
 }