Add more missing closing namespace comments.

third_party/WebKit/Source/modules/bluetooth/BluetoothSupplement.cpp

 // Copyright 2015 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 "modules/bluetooth/BluetoothSupplement.h"
 
 #include "core/dom/Document.h"
 
 namespace blink {
 
@@ skipping 34 matching lines @@
         return nullptr;
     }
     return BluetoothSupplement::from(static_cast<Document*>(executionContext)->frame());
 }
 
 DEFINE_TRACE(BluetoothSupplement)
 {
     WillBeHeapSupplement<LocalFrame>::trace(visitor);
 }
 
-}; // blink
+} // namespace blink