bluetooth: Don't call methods of WebContentsImpl while it's being destroyed.

content/test/test_render_frame_host.cc

Index: content/test/test_render_frame_host.cc
diff --git a/content/test/test_render_frame_host.cc b/content/test/test_render_frame_host.cc
index ba1051775fbecdc8ed151ff39513378144b6e617..6a6bf03c04ffefa12e55f23f577600f799e644fa 100644
--- a/content/test/test_render_frame_host.cc
+++ b/content/test/test_render_frame_host.cc
@@ -5,6 +5,7 @@
 #include "content/test/test_render_frame_host.h"
 
 #include "base/guid.h"
+#include "content/browser/bluetooth/frame_connected_bluetooth_devices.h"
 #include "content/browser/frame_host/frame_tree.h"
 #include "content/browser/frame_host/navigation_handle_impl.h"
 #include "content/browser/frame_host/navigation_request.h"
@@ -373,6 +374,11 @@ void TestRenderFrameHost::SendRendererInitiatedNavigationRequest(
   }
 }
 
+void TestRenderFrameHost::SetFrameConnectedBluetoothDevices(
+    std::unique_ptr<FrameConnectedBluetoothDevices> connected_devices) {
+  connected_devices_ = std::move(connected_devices);
+}
+
 void TestRenderFrameHost::DidChangeOpener(int opener_routing_id) {
   OnDidChangeOpener(opener_routing_id);
 }