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

content/renderer/bluetooth/web_bluetooth_impl.cc

Index: content/renderer/bluetooth/web_bluetooth_impl.cc
diff --git a/content/renderer/bluetooth/web_bluetooth_impl.cc b/content/renderer/bluetooth/web_bluetooth_impl.cc
index 3ce2a4b0c463eb78f26d15ba2a2ec82c82be3244..ef89b10da5d1c74e3a1d9b01214f64eafb92cec1 100644
--- a/content/renderer/bluetooth/web_bluetooth_impl.cc
+++ b/content/renderer/bluetooth/web_bluetooth_impl.cc
@@ -189,7 +189,9 @@ void WebBluetoothImpl::OnRequestDeviceComplete(
 
     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));
   }