Slow Reports - Embed Metadata in Traces

content/public/browser/tracing_controller.h

 // Copyright 2013 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 CONTENT_PUBLIC_BROWSER_TRACING_CONTROLLER_H_
 #define CONTENT_PUBLIC_BROWSER_TRACING_CONTROLLER_H_
 
 #include <set>
 #include <string>
 
@@ skipping 20 matching lines @@
   // receives the trace data followed by a notification that all child processes
   // have completed tracing and the data collection is over.
   // All methods are called on the UI thread.
   // Close method will be called exactly once and no methods will be
   // called after that.
   class CONTENT_EXPORT TraceDataSink
       : public base::RefCountedThreadSafe<TraceDataSink> {
    public:
     virtual void AddTraceChunk(const std::string& chunk) {}
     virtual void SetSystemTrace(const std::string& data) {}
+    virtual void SetMetadata(const std::string& data) {}
     virtual void Close() {}
 
    protected:
     friend class base::RefCountedThreadSafe<TraceDataSink>;
     virtual ~TraceDataSink() {}
   };
 
   // An implementation of this interface is passed when constructing a
   // TraceDataSink, and receives chunks of the final trace data as it's being
   // constructed.
@@ skipping 151 matching lines @@
   // Check if the tracing system is recording
   virtual bool IsRecording() const = 0;
 
  protected:
   virtual ~TracingController() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_TRACING_CONTROLLER_H_