Consume Mojo services directly in Blink's WebUSB implementation.

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 1862 matching lines @@
       'webusb/NavigatorUSB.cpp',
       'webusb/NavigatorUSB.h',
       'webusb/USB.cpp',
       'webusb/USB.h',
       'webusb/USBAlternateInterface.cpp',
       'webusb/USBAlternateInterface.h',
       'webusb/USBConfiguration.cpp',
       'webusb/USBConfiguration.h',
       'webusb/USBConnectionEvent.cpp',
       'webusb/USBConnectionEvent.h',
-      'webusb/USBController.cpp',
-      'webusb/USBController.h',
       '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/USBIsochronousInTransferPacket.h',
       'webusb/USBIsochronousInTransferResult.h',
       'webusb/USBIsochronousOutTransferPacket.h',
       'webusb/USBIsochronousOutTransferResult.h',
       'webusb/USBOutTransferResult.h',
       'worklet/Worklet.cpp',
       'worklet/Worklet.h',
@@ skipping 80 matching lines @@
       'webaudio/AudioBasicProcessorHandlerTest.cpp',
       'webaudio/ConvolverNodeTest.cpp',
       'webaudio/DynamicsCompressorNodeTest.cpp',
       'webaudio/ScriptProcessorNodeTest.cpp',
       'webaudio/StereoPannerNodeTest.cpp',
       'websockets/DOMWebSocketTest.cpp',
       'websockets/DocumentWebSocketChannelTest.cpp',
     ],
   },
 }