Consume Mojo services directly in Blink's WebUSB implementation.

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;
-}
-
-const char* USBController::supplementName()
-{
-    return "USBController";
-}
-
-USBController::USBController(LocalFrame& frame, WebUSBClient* client)
-    : LocalFrameLifecycleObserver(&frame)
-    , m_client(client)
-{
-}
-
-void USBController::willDetachFrameHost()
-{
-    m_client = nullptr;
-}
-
-DEFINE_TRACE(USBController)
-{
-    Supplement<LocalFrame>::trace(visitor);
-    LocalFrameLifecycleObserver::trace(visitor);
-}
-
-} // namespace blink