Add WebUSB bindings and client interface

Source/modules/modules.gypi

Index: Source/modules/modules.gypi
diff --git a/Source/modules/modules.gypi b/Source/modules/modules.gypi
index 7ac6b389107a487240fd3ba1098090d187df3f91..4d4adcb5ae36c1eb51da45271d254ce9febac5ad 100644
--- a/Source/modules/modules.gypi
+++ b/Source/modules/modules.gypi
@@ -290,6 +290,15 @@
       'webmidi/MIDIPort.idl',
       'websockets/CloseEvent.idl',
       'websockets/WebSocket.idl',
+      'webusb/USB.idl',
+      'webusb/USBAlternateInterface.idl',
+      'webusb/USBConfiguration.idl',
+      'webusb/USBDevice.idl',
+      'webusb/USBEndpoint.idl',
+      'webusb/USBInTransferResult.idl',
+      'webusb/USBInterface.idl',
+      'webusb/USBOutTransferResult.idl',
+      'webusb/USBTransferStatus.idl',
     ],
     # 'partial interface' or target (right side of) 'implements'
     'modules_dependency_idl_files': [
@@ -368,6 +377,7 @@
       'webgl/WebGL2RenderingContextBase.idl',
       'webgl/WebGLRenderingContextBase.idl',
       'webmidi/NavigatorWebMIDI.idl',
+      'webusb/NavigatorUSB.idl',
     ],
     # interfaces that inherit from Event
     'modules_event_idl_files': [
@@ -469,6 +479,9 @@
       'webmidi/MIDIMessageEventInit.idl',
       'webmidi/MIDIOptions.idl',
       'websockets/CloseEventInit.idl',
+      'webusb/USBControlTransferParameters.idl',
+      'webusb/USBDeviceEnumerationOptions.idl',
+      'webusb/USBDeviceFilter.idl',
     ],
     'generated_modules_files': [
       # .cpp files from make_modules_generated actions.
@@ -604,6 +617,12 @@
       '<(blink_modules_output_dir)/webmidi/MIDIOptions.h',
       '<(blink_modules_output_dir)/websockets/CloseEventInit.cpp',
       '<(blink_modules_output_dir)/websockets/CloseEventInit.h',
+      '<(blink_modules_output_dir)/webusb/USBControlTransferParameters.cpp',
+      '<(blink_modules_output_dir)/webusb/USBControlTransferParameters.h',
+      '<(blink_modules_output_dir)/webusb/USBDeviceEnumerationOptions.cpp',
+      '<(blink_modules_output_dir)/webusb/USBDeviceEnumerationOptions.h',
+      '<(blink_modules_output_dir)/webusb/USBDeviceFilter.cpp',
+      '<(blink_modules_output_dir)/webusb/USBDeviceFilter.h',
     ],
     'modules_files': [
       '<@(extra_blink_module_files)',
@@ -1675,6 +1694,26 @@
       'websockets/WebSocketFrame.h',
       'websockets/WorkerWebSocketChannel.cpp',
       'websockets/WorkerWebSocketChannel.h',
+      '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/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/USBOutTransferResult.h',
     ],
     # 'partial interface' or target (right side of) 'implements'
     'modules_testing_dependency_idl_files' : [