bluetooth: Web Bluetooth can filter by empty device names, doesn't leak MACs.

content/renderer/bluetooth/web_bluetooth_impl.cc

 // Copyright 2014 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/bluetooth/web_bluetooth_impl.h"
 
 #include <memory>
 #include <utility>
 #include <vector>
 
@@ skipping 171 matching lines @@
     std::unique_ptr<blink::WebBluetoothRequestDeviceCallbacks> callbacks,
     const blink::mojom::WebBluetoothError error,
     blink::mojom::WebBluetoothDevicePtr device) {
   if (error == blink::mojom::WebBluetoothError::SUCCESS) {
     blink::WebVector<blink::WebString> uuids(device->uuids.size());
     for (size_t i = 0; i < device->uuids.size(); ++i)
       uuids[i] = blink::WebString::fromUTF8(device->uuids[i]);
 
     callbacks->onSuccess(base::WrapUnique(new blink::WebBluetoothDeviceInit(
         blink::WebString::fromUTF8(device->id),
-        blink::WebString::fromUTF8(device->name), uuids)));
+        device->name.is_null() ? blink::WebString()
+                               : blink::WebString::fromUTF8(device->name),
+        uuids)));
   } else {
     callbacks->onError(ToInt32(error));
   }
 }
 
 void WebBluetoothImpl::GattServerDisconnected(const mojo::String& device_id) {
   auto device_iter = connected_devices_.find(device_id);
   if (device_iter != connected_devices_.end()) {
     // Remove device from the map before calling dispatchGattServerDisconnected
     // to avoid removing a device the gattserverdisconnected event handler might
@@ skipping 114 matching lines @@
     // Create an associated interface ptr and pass it to the WebBluetoothService
     // so that it can send us events without us prompting.
     blink::mojom::WebBluetoothServiceClientAssociatedPtrInfo ptr_info;
     binding_.Bind(&ptr_info, web_bluetooth_service_.associated_group());
     web_bluetooth_service_->SetClient(std::move(ptr_info));
   }
   return *web_bluetooth_service_;
 }
 
 }  // namespace content