Chromium roll (https://codereview.chromium.org/976353002)

sky/tools/debugger/trace_collector.h

 // Copyright 2014 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 SKY_TOOLS_DEBUGGER_TRACE_COLLECTOR_H_
 #define SKY_TOOLS_DEBUGGER_TRACE_COLLECTOR_H_
 
 #include <vector>
 
 #include "base/callback.h"
 #include "mojo/common/data_pipe_drainer.h"
 
 namespace sky {
 namespace debugger {
 
 class TraceCollector : public mojo::common::DataPipeDrainer::Client {
  public:
   typedef base::Callback<void(std::string)> TraceCallback;
 
   explicit TraceCollector(mojo::ScopedDataPipeConsumerHandle source);
-  ~TraceCollector();
+  ~TraceCollector() override;
 
   void GetTrace(TraceCallback callback);
 
  private:
   void OnDataAvailable(const void* data, size_t num_bytes) override;
   void OnDataComplete() override;
 
   std::string GetTraceAsString();
 
   mojo::common::DataPipeDrainer drainer_;
   std::vector<char> trace_;
   bool is_complete_;
   TraceCallback callback_;
 };
 
 }  // namespace debugger
 }  // namespace sky
 
 #endif  // SKY_TOOLS_DEBUGGER_TRACE_COLLECTOR_H_