[DevTools] Filter any messages from previous sessions in DevToolsAgentHostImpl

content/browser/devtools/protocol/tracing_handler.h

Index: content/browser/devtools/protocol/tracing_handler.h
diff --git a/content/browser/devtools/protocol/tracing_handler.h b/content/browser/devtools/protocol/tracing_handler.h
index 886067030fd104214e330b4b84e1e4dd9231ad76..c4357732a3db7c42ad0278927ee5e629467ee16d 100644
--- a/content/browser/devtools/protocol/tracing_handler.h
+++ b/content/browser/devtools/protocol/tracing_handler.h
@@ -41,23 +41,26 @@ class TracingHandler {
   void OnTraceToStreamComplete(const std::string& stream_handle);
 
   // Protocol methods.
-  Response Start(DevToolsCommandId command_id,
+  Response Start(int session_id,
+                 DevToolsCommandId command_id,
                  const std::string* categories,
                  const std::string* options,
                  const double* buffer_usage_reporting_interval,
                  const std::string* transfer_mode);
-  Response End(DevToolsCommandId command_id);
-  Response GetCategories(DevToolsCommandId command);
-  Response RequestMemoryDump(DevToolsCommandId command_id);
+  Response End(int session_id, DevToolsCommandId command_id);
+  Response GetCategories(int session_id, DevToolsCommandId command);
+  Response RequestMemoryDump(int session_id, DevToolsCommandId command_id);
 
   bool did_initiate_recording() { return did_initiate_recording_; }
 
  private:
-  void OnRecordingEnabled(DevToolsCommandId command_id);
+  void OnRecordingEnabled(int session_id, DevToolsCommandId command_id);
   void OnBufferUsage(float percent_full, size_t approximate_event_count);
-  void OnCategoriesReceived(DevToolsCommandId command_id,
+  void OnCategoriesReceived(int session_id,
+                            DevToolsCommandId command_id,
                             const std::set<std::string>& category_set);
-  void OnMemoryDumpFinished(DevToolsCommandId command_id,
+  void OnMemoryDumpFinished(int session_id,
+                            DevToolsCommandId command_id,
                             uint64 dump_guid,
                             bool success);