Use OnceCallback on Mojo interfaces in //chrome/common/media_router

chrome/common/media_router/mojo/media_router_struct_traits_unittest.cc

 // Copyright 2017 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 "chrome/common/media_router/mojo/media_router_struct_traits.h"
 
+#include <utility>
+
 #include "base/message_loop/message_loop.h"
 #include "chrome/common/media_router/discovery/media_sink_internal.h"
 #include "chrome/common/media_router/mojo/media_router.mojom.h"
 #include "chrome/common/media_router/mojo/media_router_traits_test_service.mojom.h"
 #include "mojo/public/cpp/bindings/binding_set.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace media_router {
 
 class MediaRouterStructTraitsTest
     : public testing::Test,
       public media_router::mojom::MediaRouterTraitsTestService {
  public:
   MediaRouterStructTraitsTest() {}
 
  protected:
   mojom::MediaRouterTraitsTestServicePtr GetTraitsTestProxy() {
     return traits_test_bindings_.CreateInterfacePtrAndBind(this);
   }
 
  private:
   // MediaRouterTraitsTestService Impl
   void EchoMediaSink(const MediaSinkInternal& sink,
-                     const EchoMediaSinkCallback& callback) override {
-    callback.Run(sink);
+                     EchoMediaSinkCallback callback) override {
+    std::move(callback).Run(sink);
   }
 
   base::MessageLoop loop_;
   mojo::BindingSet<MediaRouterTraitsTestService> traits_test_bindings_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaRouterStructTraitsTest);
 };
 
 TEST_F(MediaRouterStructTraitsTest, DialMediaSink) {
   MediaSink::Id sink_id("sinkId123");
@@ skipping 51 matching lines @@
   generic_sink.set_sink(sink);
 
   mojom::MediaRouterTraitsTestServicePtr proxy = GetTraitsTestProxy();
   MediaSinkInternal output;
   proxy->EchoMediaSink(generic_sink, &output);
 
   EXPECT_EQ(generic_sink, output);
 }
 
 }  // namespace media_router