bluetooth: Clean up WebBluetoothServiceImpl when adapter is removed

content/browser/bluetooth/web_bluetooth_service_impl.cc

Index: content/browser/bluetooth/web_bluetooth_service_impl.cc
diff --git a/content/browser/bluetooth/web_bluetooth_service_impl.cc b/content/browser/bluetooth/web_bluetooth_service_impl.cc
index 978aa88468219fdf3c73719494ea4787aad60b7b..7f6228c080efc28a4702ce315697cb94102eaf8c 100644
--- a/content/browser/bluetooth/web_bluetooth_service_impl.cc
+++ b/content/browser/bluetooth/web_bluetooth_service_impl.cc
@@ -91,7 +91,15 @@ void WebBluetoothServiceImpl::DidFinishNavigation(
       navigation_handle->GetRenderFrameHost() == render_frame_host_ &&
       !navigation_handle->IsSamePage()) {
     // After navigation we need to clear the frame's state.
-    characteristic_id_to_notify_session_.clear();
+    ClearState();
+  }
+}
+
+void WebBluetoothServiceImpl::AdapterPresentChanged(
+    device::BluetoothAdapter* adapter,
+    bool present) {
+  if (!present) {
+    ClearState();
   }
 }
 
@@ -376,4 +384,8 @@ url::Origin WebBluetoothServiceImpl::GetOrigin() {
   return render_frame_host_->GetLastCommittedOrigin();
 }
 
+void WebBluetoothServiceImpl::ClearState() {
+  characteristic_id_to_notify_session_.clear();
+}
+
 }  // namespace content