Put the RenderFrame's ID into a per-frame WebBluetooth, and plumb that back to the browser.

content/renderer/render_frame_impl.cc

 // Copyright 2013 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 "content/renderer/render_frame_impl.h"
 
 #include <map>
 #include <string>
 
 #include "base/auto_reset.h"
 #include "base/command_line.h"
 #include "base/debug/alias.h"
 #include "base/debug/asan_invalid_access.h"
 #include "base/debug/dump_without_crashing.h"
 #include "base/i18n/char_iterator.h"
 #include "base/metrics/histogram.h"
 #include "base/process/process.h"
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/thread_task_runner_handle.h"
 #include "base/time/time.h"
 #include "cc/base/switches.h"
 #include "content/child/appcache/appcache_dispatcher.h"
+#include "content/child/bluetooth/web_bluetooth_impl.h"
 #include "content/child/permissions/permission_dispatcher.h"
 #include "content/child/plugin_messages.h"
 #include "content/child/quota_dispatcher.h"
 #include "content/child/request_extra_data.h"
 #include "content/child/service_worker/service_worker_handle_reference.h"
 #include "content/child/service_worker/service_worker_network_provider.h"
 #include "content/child/service_worker/service_worker_provider_context.h"
 #include "content/child/service_worker/web_service_worker_provider_impl.h"
 #include "content/child/v8_value_converter_impl.h"
 #include "content/child/web_url_loader_impl.h"
@@ skipping 3781 matching lines @@
 
 void RenderFrameImpl::unregisterProtocolHandler(const WebString& scheme,
                                                 const WebURL& url) {
   bool user_gesture = WebUserGestureIndicator::isProcessingUserGesture();
   Send(new FrameHostMsg_UnregisterProtocolHandler(routing_id_,
                                                   base::UTF16ToUTF8(scheme),
                                                   url,
                                                   user_gesture));
 }
 
+blink::WebBluetooth* RenderFrameImpl::bluetooth() {
+  if (!bluetooth_) {
+    bluetooth_.reset(new WebBluetoothImpl(
+        ChildThreadImpl::current()->thread_safe_sender(), routing_id_));
+  }
+
+  return bluetooth_.get();
+}
+
 #if defined(ENABLE_WEBVR)
 blink::WebVRClient* RenderFrameImpl::webVRClient() {
   if (!vr_dispatcher_)
     vr_dispatcher_.reset(new VRDispatcher(GetServiceRegistry()));
 
   return vr_dispatcher_.get();
 }
 #endif
 
 void RenderFrameImpl::DidPlay(WebMediaPlayer* player) {
@@ skipping 1235 matching lines @@
 void RenderFrameImpl::RegisterMojoServices() {
   // Only main frame have ImageDownloader service.
   if (!frame_->parent()) {
     GetServiceRegistry()->AddService<image_downloader::ImageDownloader>(
         base::Bind(&ImageDownloaderImpl::CreateMojoService,
                    base::Unretained(this)));
   }
 }
 
 }  // namespace content