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

Source/modules/bluetooth/Bluetooth.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/Bluetooth.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/BluetoothDevice.h"
 #include "modules/bluetooth/BluetoothError.h"
+#include "modules/bluetooth/BluetoothSupplement.h"
 #include "modules/bluetooth/BluetoothUUID.h"
 #include "modules/bluetooth/RequestDeviceOptions.h"
 #include "platform/UserGestureIndicator.h"
-#include "public/platform/Platform.h"
 #include "public/platform/modules/bluetooth/WebBluetooth.h"
 #include "public/platform/modules/bluetooth/WebRequestDeviceOptions.h"
 
 namespace blink {
 
 // Returns a DOMException if the conversion fails, or null if it succeeds.
 static void convertRequestDeviceOptions(const RequestDeviceOptions& options, WebRequestDeviceOptions& result, ExceptionState& exceptionState)
 {
     if (options.hasFilters()) {
         Vector<WebBluetoothScanFilter> filters;
@@ skipping 22 matching lines @@
 }
 
 // https://webbluetoothchrome.github.io/web-bluetooth/#dom-bluetooth-requestdevice
 ScriptPromise Bluetooth::requestDevice(ScriptState* scriptState, const RequestDeviceOptions& options, ExceptionState& exceptionState)
 {
     // 2. If the algorithm is not allowed to show a popup, reject promise with a SecurityError and abort these steps.
     if (!UserGestureIndicator::consumeUserGesture()) {
         return ScriptPromise::rejectWithDOMException(scriptState, DOMException::create(SecurityError, "Must be handling a user gesture to show a permission request."));
     }
 
-    WebBluetooth* webbluetooth = Platform::current()->bluetooth();
+    WebBluetooth* webbluetooth = BluetoothSupplement::from(scriptState);
     if (!webbluetooth)
         return ScriptPromise::rejectWithDOMException(scriptState, DOMException::create(NotSupportedError));
 
     // 3. In order to convert the arguments from service names and aliases to just UUIDs, do the following substeps:
     WebRequestDeviceOptions webOptions;
     convertRequestDeviceOptions(options, webOptions, exceptionState);
     if (exceptionState.hadException())
         return exceptionState.reject(scriptState);
 
     // Subsequent steps are handled in the browser process.
     RefPtrWillBeRawPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver::create(scriptState);
     ScriptPromise promise = resolver->promise();
     webbluetooth->requestDevice(webOptions, new CallbackPromiseAdapter<BluetoothDevice, BluetoothError>(resolver));
     return promise;
 
 }
 
 } // namespace blink