Delete the old WebSocket implementation.

Source/modules/modules.gypi

 {
   'includes': [
     '../core/core_generated.gypi',
     'modules_generated.gypi',
   ],
   'variables': {
     # Experimental hooks for embedder to provide extra IDL and source files.
     #
     # Note: this is not a supported API. If you rely on this, you will be broken
     # from time to time as the code generator changes in backward incompatible
@@ skipping 977 matching lines @@
       'webmidi/MIDIOutputMap.cpp',
       'webmidi/MIDIOutputMap.h',
       'webmidi/MIDIPort.cpp',
       'webmidi/MIDIPort.h',
       'webmidi/MIDISuccessCallback.h',
       'webmidi/NavigatorWebMIDI.cpp',
       'webmidi/NavigatorWebMIDI.h',
       'websockets/CloseEvent.h',
       'websockets/DOMWebSocket.cpp',
       'websockets/DOMWebSocket.h',
-      'websockets/MainThreadWebSocketChannel.cpp',
-      'websockets/MainThreadWebSocketChannel.h',
       'websockets/NewWebSocketChannelImpl.cpp',
       'websockets/NewWebSocketChannelImpl.h',
       'websockets/WebSocketChannel.cpp',
       'websockets/WebSocketChannel.h',
       'websockets/WebSocketChannelClient.h',
-      'websockets/WebSocketDeflateFramer.cpp',
-      'websockets/WebSocketDeflateFramer.h',
-      'websockets/WebSocketDeflater.cpp',
-      'websockets/WebSocketDeflater.h',
-      'websockets/WebSocketExtensionDispatcher.cpp',
-      'websockets/WebSocketExtensionDispatcher.h',
-      'websockets/WebSocketExtensionParser.cpp',
-      'websockets/WebSocketExtensionParser.h',
-      'websockets/WebSocketExtensionProcessor.h',
       'websockets/WebSocketFrame.cpp',
       'websockets/WebSocketFrame.h',
-      'websockets/WebSocketHandshake.cpp',
-      'websockets/WebSocketHandshake.h',
-      'websockets/WebSocketPerMessageDeflate.cpp',
-      'websockets/WebSocketPerMessageDeflate.h',
       'websockets/WorkerThreadableWebSocketChannel.cpp',
       'websockets/WorkerThreadableWebSocketChannel.h',
     ],
     # 'partial interface' or target (right side of) 'implements'
     'modules_testing_dependency_idl_files' : [
       'geolocation/testing/InternalsGeolocation.idl',
       'navigatorcontentutils/testing/InternalsNavigatorContentUtils.idl',
       'speech/testing/InternalsSpeechSynthesis.idl',
       'vibration/testing/InternalsVibration.idl',
     ],
@@ skipping 18 matching lines @@
       'indexeddb/IDBKeyPathTest.cpp',
       'indexeddb/IDBRequestTest.cpp',
       'indexeddb/IDBTransactionTest.cpp',
       'serviceworkers/CacheTest.cpp',
       'serviceworkers/FetchResponseDataTest.cpp',
       'serviceworkers/RequestTest.cpp',
       'serviceworkers/ResponseTest.cpp',
       'serviceworkers/ServiceWorkerContainerTest.cpp',
       'websockets/DOMWebSocketTest.cpp',
       'websockets/NewWebSocketChannelImplTest.cpp',
-      'websockets/WebSocketDeflaterTest.cpp',
-      'websockets/WebSocketExtensionDispatcherTest.cpp',
-      'websockets/WebSocketExtensionParserTest.cpp',
-      'websockets/WebSocketPerMessageDeflateTest.cpp',
     ],
   },
 }