[DevTools] Support multiple DevToolsMessageChunkProcessor instances

content/browser/devtools/worker_devtools_agent_host.h

Index: content/browser/devtools/worker_devtools_agent_host.h
diff --git a/content/browser/devtools/worker_devtools_agent_host.h b/content/browser/devtools/worker_devtools_agent_host.h
index 4c6192e37f6b4226811c7eaeb6ba0dfbf8358f59..bf55dad3e9c1009ca3d939251a7686de1acaa04b 100644
--- a/content/browser/devtools/worker_devtools_agent_host.h
+++ b/content/browser/devtools/worker_devtools_agent_host.h
@@ -5,6 +5,7 @@
 #ifndef CONTENT_BROWSER_DEVTOOLS_WORKER_DEVTOOLS_AGENT_HOST_H_
 #define CONTENT_BROWSER_DEVTOOLS_WORKER_DEVTOOLS_AGENT_HOST_H_
 
+#include "base/containers/flat_map.h"
 #include "base/macros.h"
 #include "content/browser/devtools/devtools_agent_host_impl.h"
 #include "content/common/content_export.h"
@@ -64,8 +65,10 @@ class CONTENT_EXPORT WorkerDevToolsAgentHost : public DevToolsAgentHostImpl,
   void DetachFromWorker();
   void WorkerCreated();
   void OnDispatchOnInspectorFrontend(const DevToolsMessageChunk& message);
+  void SendChunkedMessage(int session_id, const std::string& message);
 
-  DevToolsMessageChunkProcessor chunk_processor_;
+  base::flat_map<int, std::unique_ptr<DevToolsMessageChunkProcessor>>
+      chunk_processors_;
   WorkerState state_;
   WorkerId worker_id_;
   DISALLOW_COPY_AND_ASSIGN(WorkerDevToolsAgentHost);