Enable WebUSB through the Experimental Framework.

third_party/WebKit/Source/modules/webusb/USBController.cpp

 // Copyright 2015 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.
 
 #include "modules/webusb/USBController.h"
 
 #include "platform/RuntimeEnabledFeatures.h"
 #include "public/platform/modules/webusb/WebUSBClient.h"
 
 namespace blink {
 
 USBController::~USBController()
 {
 }
 
 void USBController::provideTo(LocalFrame& frame, WebUSBClient* client)
 {
-    ASSERT(RuntimeEnabledFeatures::webUSBEnabled());
     USBController* controller = new USBController(frame, client);
     Supplement<LocalFrame>::provideTo(frame, supplementName(), controller);
 }
 
 USBController& USBController::from(LocalFrame& frame)
 {
     USBController* controller = static_cast<USBController*>(Supplement<LocalFrame>::from(frame, supplementName()));
     ASSERT(controller);
     return *controller;
 }
@@ skipping 14 matching lines @@
     m_client = nullptr;
 }
 
 DEFINE_TRACE(USBController)
 {
     Supplement<LocalFrame>::trace(visitor);
     LocalFrameLifecycleObserver::trace(visitor);
 }
 
 } // namespace blink