Expose worklet on Window through attribute renderWorklet.

third_party/WebKit/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 372 matching lines @@
       'storage/WindowStorage.idl',
       'vibration/NavigatorVibration.idl',
       'vr/NavigatorVRDevice.idl',
       'wake_lock/ScreenWakeLock.idl',
       'webaudio/WindowWebAudio.idl',
       'webdatabase/WindowWebDatabase.idl',
       'webgl/WebGL2RenderingContextBase.idl',
       'webgl/WebGLRenderingContextBase.idl',
       'webmidi/NavigatorWebMIDI.idl',
       'webusb/NavigatorUSB.idl',
+      'worklet/WindowWorklet.idl',
     ],
     # interfaces that inherit from Event
     'modules_event_idl_files': [
       'app_banner/BeforeInstallPromptEvent.idl',
       'background_sync/SyncEvent.idl',
       'device_light/DeviceLightEvent.idl',
       'device_orientation/DeviceMotionEvent.idl',
       'device_orientation/DeviceOrientationEvent.idl',
       'encryptedmedia/MediaEncryptedEvent.idl',
       'encryptedmedia/MediaKeyMessageEvent.idl',
@@ skipping 1420 matching lines @@
       'webusb/USBDevice.cpp',
       'webusb/USBDevice.h',
       'webusb/USBEndpoint.cpp',
       'webusb/USBEndpoint.h',
       'webusb/USBError.cpp',
       'webusb/USBError.h',
       'webusb/USBInTransferResult.h',
       'webusb/USBInterface.cpp',
       'webusb/USBInterface.h',
       'webusb/USBOutTransferResult.h',
+      'worklet/DOMWindowWorklet.cpp',
+      'worklet/DOMWindowWorklet.h',
       'worklet/Worklet.cpp',
       'worklet/Worklet.h',
       'worklet/WorkletGlobalScope.cpp',
       'worklet/WorkletGlobalScope.h',
     ],
     # 'partial interface' or target (right side of) 'implements'
     'modules_testing_dependency_idl_files' : [
       'accessibility/testing/InternalsAccessibility.idl',
       'geolocation/testing/InternalsGeolocation.idl',
       'navigatorcontentutils/testing/InternalsNavigatorContentUtils.idl',
@@ skipping 58 matching lines @@
       'webaudio/AudioBasicProcessorHandlerTest.cpp',
       'webaudio/ConvolverNodeTest.cpp',
       'webaudio/DynamicsCompressorNodeTest.cpp',
       'webaudio/ScriptProcessorNodeTest.cpp',
       'webaudio/StereoPannerNodeTest.cpp',
       'websockets/DOMWebSocketTest.cpp',
       'websockets/DocumentWebSocketChannelTest.cpp',
     ],
   },
 }