Attach a WebBluetooth to the LocalFrame and use it if it's available.

Source/modules/bluetooth/BluetoothGATTService.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 "config.h"
 #include "modules/bluetooth/BluetoothGATTService.h"
 
 #include "bindings/core/v8/CallbackPromiseAdapter.h"
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "core/dom/DOMException.h"
 #include "core/dom/ExceptionCode.h"
 #include "modules/bluetooth/BluetoothError.h"
 #include "modules/bluetooth/BluetoothGATTCharacteristic.h"
+#include "modules/bluetooth/BluetoothSupplement.h"
 #include "modules/bluetooth/BluetoothUUID.h"
-#include "public/platform/Platform.h"
 #include "public/platform/modules/bluetooth/WebBluetooth.h"
 
 namespace blink {
 
 BluetoothGATTService::BluetoothGATTService(PassOwnPtr<WebBluetoothGATTService> webService)
     : m_webService(webService)
 {
 }
 
 BluetoothGATTService* BluetoothGATTService::take(ScriptPromiseResolver*, PassOwnPtr<WebBluetoothGATTService> webService)
 {
     if (!webService) {
         return nullptr;
     }
     return new BluetoothGATTService(webService);
 }
 
 ScriptPromise BluetoothGATTService::getCharacteristic(ScriptState* scriptState,
     const StringOrUnsignedLong& characteristic, ExceptionState& exceptionState)
 {
-    WebBluetooth* webbluetooth = Platform::current()->bluetooth();
+    WebBluetooth* webbluetooth = BluetoothSupplement::from(scriptState);
 
     String characteristicUUID = BluetoothUUID::getCharacteristic(characteristic, exceptionState);
     if (exceptionState.hadException())
         return exceptionState.reject(scriptState);
 
     RefPtrWillBeRawPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver::create(scriptState);
     ScriptPromise promise = resolver->promise();
     webbluetooth->getCharacteristic(m_webService->serviceInstanceID, characteristicUUID, new CallbackPromiseAdapter<BluetoothGATTCharacteristic, BluetoothError>(resolver));
 
     return promise;
 }
 
 } // namespace blink