Remove unnecessary window WebAudio attributes

third_party/WebKit/Source/modules/modules_idl_files.gni

 # Copyright 2016 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.
 
 import("//third_party/WebKit/Source/bindings/bindings.gni")
 
 # The paths in this file are absolute since this file is imported and the
 # file lists must be valid from multple "current directories".
 
 bindings_modules_output_dir = "$bindings_output_dir/modules"
@@ skipping 610 matching lines @@
           "remoteplayback/HTMLMediaElementRemotePlayback.idl",
           "screen_orientation/ScreenScreenOrientation.idl",
           "serviceworkers/NavigatorServiceWorker.idl",
           "speech/WindowSpeech.idl",
           "speech/WindowSpeechSynthesis.idl",
           "srcobject/HTMLMediaElementSrcObject.idl",
           "storage/WindowStorage.idl",
           "vibration/NavigatorVibration.idl",
           "vr/NavigatorVR.idl",
           "wake_lock/ScreenWakeLock.idl",
-          "webaudio/WindowWebAudio.idl",
           "webaudio/WindowAudioWorklet.idl",
           "webauth/NavigatorAuth.idl",
           "webdatabase/WindowWebDatabase.idl",
           "webgl/WebGL2RenderingContextBase.idl",
           "webgl/WebGLRenderingContextBase.idl",
           "webmidi/NavigatorWebMIDI.idl",
           "webshare/NavigatorShare.idl",
           "webusb/NavigatorUSB.idl",
         ],
         "abspath")
@@ skipping 335 matching lines @@
   "$blink_modules_output_dir/websockets/CloseEventInit.h",
   "$blink_modules_output_dir/webusb/USBConnectionEventInit.cpp",
   "$blink_modules_output_dir/webusb/USBConnectionEventInit.h",
   "$blink_modules_output_dir/webusb/USBControlTransferParameters.cpp",
   "$blink_modules_output_dir/webusb/USBControlTransferParameters.h",
   "$blink_modules_output_dir/webusb/USBDeviceFilter.cpp",
   "$blink_modules_output_dir/webusb/USBDeviceFilter.h",
   "$blink_modules_output_dir/webusb/USBDeviceRequestOptions.cpp",
   "$blink_modules_output_dir/webusb/USBDeviceRequestOptions.h",
 ]