media: Add out-of-line copy ctors for complex classes.

media/base/serial_runner.h

 // Copyright (c) 2012 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.
 
 #ifndef MEDIA_BASE_SERIAL_RUNNER_H_
 #define MEDIA_BASE_SERIAL_RUNNER_H_
 
 #include <memory>
 #include <queue>
 
@@ skipping 16 matching lines @@
 // the completion callback as the series progresses.
 class MEDIA_EXPORT SerialRunner {
  public:
   typedef base::Callback<void(const base::Closure&)> BoundClosure;
   typedef base::Callback<void(const PipelineStatusCB&)> BoundPipelineStatusCB;
 
   // Serial queue of bound functions to run.
   class MEDIA_EXPORT Queue {
    public:
     Queue();
+    Queue(const Queue& other);
     ~Queue();
 
     void Push(const base::Closure& closure);
     void Push(const BoundClosure& bound_fn);
     void Push(const BoundPipelineStatusCB& bound_fn);
 
    private:
     friend class SerialRunner;
 
     BoundPipelineStatusCB Pop();
@@ skipping 33 matching lines @@
 
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<SerialRunner> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SerialRunner);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_SERIAL_RUNNER_H_