Use OnceCallback on Mojo interfaces in //content

content/browser/browser_associated_interface_unittest.cc

 // Copyright 2016 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 <memory>
 #include <string>
+#include <utility>
 
 #include "base/memory/ref_counted.h"
 #include "base/message_loop/message_loop.h"
 #include "base/pickle.h"
 #include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/stringprintf.h"
 #include "base/threading/thread.h"
 #include "content/public/browser/browser_associated_interface.h"
 #include "content/public/browser/browser_message_filter.h"
@@ skipping 72 matching lines @@
     EXPECT_EQ(next_expected_string_, actual_string);
     message_count_++;
     return true;
   }
 
   // mojom::BrowserAssociatedInterfaceTestDriver:
   void ExpectString(const std::string& expected) override {
     next_expected_string_ = expected;
   }
 
-  void RequestQuit(const RequestQuitCallback& callback) override {
+  void RequestQuit(RequestQuitCallback callback) override {
     EXPECT_EQ(kNumTestMessages, message_count_);
-    callback.Run();
+    std::move(callback).Run();
     base::MessageLoop::current()->QuitWhenIdle();
   }
 
   std::string next_expected_string_;
   int message_count_ = 0;
 };
 
 class TestClientRunner {
  public:
   explicit TestClientRunner(mojo::ScopedMessagePipeHandle pipe)
@@ skipping 49 matching lines @@
   AddFilterToChannel(new TestDriverMessageFilter, proxy.channel());
 
   TestClientRunner client(std::move(pipe.handle1));
   base::RunLoop().Run();
 
   proxy.ShutDown();
   base::RunLoop().RunUntilIdle();
 }
 
 }  // namespace content