Ship WebUSB on Dedicated Workers

This change enables WebUSB on Dedicated Workers by default.

Intent to Ship:
https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/dKj0z6n6n5s

Bug: 837406
Change-Id: I7bbc299dddf215cbe83bf563554c3c09dcdd943f
Reviewed-on: https://chromium-review.googlesource.com/1137215
Commit-Queue: Ovidio Henriquez <odejesush@chromium.org>
Reviewed-by: Philip Jägenstedt <foolip@chromium.org>
Reviewed-by: Chong Zhang <chongz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#576918}

third_party/WebKit/LayoutTests/virtual/stable/webexposed/global-interface-listing-dedicated-worker-expected.txt

@@ -1027,6 +1027,110 @@ Starting worker: resources/global-interface-listing-worker.js
 [Worker]     method sort
 [Worker]     method toString
 [Worker]     method values
+[Worker] interface USB : EventTarget
+[Worker]     attribute @@toStringTag
+[Worker]     getter onconnect
+[Worker]     getter ondisconnect
+[Worker]     method constructor
+[Worker]     method getDevices
+[Worker]     setter onconnect
+[Worker]     setter ondisconnect
+[Worker] interface USBAlternateInterface
+[Worker]     attribute @@toStringTag
+[Worker]     getter alternateSetting
+[Worker]     getter endpoints
+[Worker]     getter interfaceClass
+[Worker]     getter interfaceName
+[Worker]     getter interfaceProtocol
+[Worker]     getter interfaceSubclass
+[Worker]     method constructor
+[Worker] interface USBConfiguration
+[Worker]     attribute @@toStringTag
+[Worker]     getter configurationName
+[Worker]     getter configurationValue
+[Worker]     getter interfaces
+[Worker]     method constructor
+[Worker] interface USBConnectionEvent : Event
+[Worker]     attribute @@toStringTag
+[Worker]     getter device
+[Worker]     method constructor
+[Worker] interface USBDevice
+[Worker]     attribute @@toStringTag
+[Worker]     getter configuration
+[Worker]     getter configurations
+[Worker]     getter deviceClass
+[Worker]     getter deviceProtocol
+[Worker]     getter deviceSubclass
+[Worker]     getter deviceVersionMajor
+[Worker]     getter deviceVersionMinor
+[Worker]     getter deviceVersionSubminor
+[Worker]     getter manufacturerName
+[Worker]     getter opened
+[Worker]     getter productId
+[Worker]     getter productName
+[Worker]     getter serialNumber
+[Worker]     getter usbVersionMajor
+[Worker]     getter usbVersionMinor
+[Worker]     getter usbVersionSubminor
+[Worker]     getter vendorId
+[Worker]     method claimInterface
+[Worker]     method clearHalt
+[Worker]     method close
+[Worker]     method constructor
+[Worker]     method controlTransferIn
+[Worker]     method controlTransferOut
+[Worker]     method isochronousTransferIn
+[Worker]     method isochronousTransferOut
+[Worker]     method open
+[Worker]     method releaseInterface
+[Worker]     method reset
+[Worker]     method selectAlternateInterface
+[Worker]     method selectConfiguration
+[Worker]     method transferIn
+[Worker]     method transferOut
+[Worker] interface USBEndpoint
+[Worker]     attribute @@toStringTag
+[Worker]     getter direction
+[Worker]     getter endpointNumber
+[Worker]     getter packetSize
+[Worker]     getter type
+[Worker]     method constructor
+[Worker] interface USBInTransferResult
+[Worker]     attribute @@toStringTag
+[Worker]     getter data
+[Worker]     getter status
+[Worker]     method constructor
+[Worker] interface USBInterface
+[Worker]     attribute @@toStringTag
+[Worker]     getter alternate
+[Worker]     getter alternates
+[Worker]     getter claimed
+[Worker]     getter interfaceNumber
+[Worker]     method constructor
+[Worker] interface USBIsochronousInTransferPacket
+[Worker]     attribute @@toStringTag
+[Worker]     getter data
+[Worker]     getter status
+[Worker]     method constructor
+[Worker] interface USBIsochronousInTransferResult
+[Worker]     attribute @@toStringTag
+[Worker]     getter data
+[Worker]     getter packets
+[Worker]     method constructor
+[Worker] interface USBIsochronousOutTransferPacket
+[Worker]     attribute @@toStringTag
+[Worker]     getter bytesWritten
+[Worker]     getter status
+[Worker]     method constructor
+[Worker] interface USBIsochronousOutTransferResult
+[Worker]     attribute @@toStringTag
+[Worker]     getter packets
+[Worker]     method constructor
+[Worker] interface USBOutTransferResult
+[Worker]     attribute @@toStringTag
+[Worker]     getter bytesWritten
+[Worker]     getter status
+[Worker]     method constructor
 [Worker] interface WebGL2RenderingContext
 [Worker]     attribute @@toStringTag
 [Worker]     attribute ACTIVE_ATTRIBUTES

third_party/blink/renderer/modules/webusb/worker_navigator_usb.idl

@@ -5,7 +5,7 @@
 // https://wicg.github.io/webusb/#enumeration
 
 [
-    Exposed(DedicatedWorker WebUSBOnDedicatedWorkers, SharedWorker WebUSBOnSharedWorkers),
+    Exposed(DedicatedWorker WebUSBOnDedicatedWorkers),
     ImplementedAs=WorkerNavigatorUSB,
     SecureContext
 ] partial interface WorkerNavigator {

third_party/blink/renderer/platform/runtime_enabled_features.json5

@@ -1387,7 +1387,7 @@
     },
     {
       name: "WebUSBOnDedicatedWorkers",
-      status: "experimental",
+      status: "stable",
       depends_on: ["WebUSB"],
     },
     {