[DevTools] filter any messages from previous session in DevToolsAgentHostImpl

content/child/shared_worker_devtools_agent.cc

Index: content/child/shared_worker_devtools_agent.cc
diff --git a/content/child/shared_worker_devtools_agent.cc b/content/child/shared_worker_devtools_agent.cc
index 26a51edf6dd7f0ef15bf4d0dd87e9ca476203823..9b1996fcb88485ac68fae189250616098774b7d0 100644
--- a/content/child/shared_worker_devtools_agent.cc
+++ b/content/child/shared_worker_devtools_agent.cc
@@ -44,6 +44,7 @@ bool SharedWorkerDevToolsAgent::OnMessageReceived(const IPC::Message& message) {
 }
 
 void SharedWorkerDevToolsAgent::SendDevToolsMessage(
+    int session_id,
     int call_id,
     const blink::WebString& msg,
     const blink::WebString& state) {
@@ -55,6 +56,7 @@ void SharedWorkerDevToolsAgent::SendDevToolsMessage(
 
   if (message.length() < kMaxMessageChunkSize) {
     chunk.data.swap(message);
+    chunk.session_id = session_id;
     chunk.call_id = call_id;
     chunk.post_state = post_state;
     chunk.is_last = true;
@@ -65,6 +67,7 @@ void SharedWorkerDevToolsAgent::SendDevToolsMessage(
 
   for (size_t pos = 0; pos < message.length(); pos += kMaxMessageChunkSize) {
     chunk.is_last = pos + kMaxMessageChunkSize >= message.length();
+    chunk.session_id = chunk.is_last ? session_id : 0;
     chunk.call_id = chunk.is_last ? call_id : 0;
     chunk.post_state = chunk.is_last ? post_state : std::string();
     chunk.data = message.substr(pos, kMaxMessageChunkSize);
@@ -75,13 +78,15 @@ void SharedWorkerDevToolsAgent::SendDevToolsMessage(
   }
 }
 
-void SharedWorkerDevToolsAgent::OnAttach(const std::string& host_id) {
-  webworker_->attachDevTools(WebString::fromUTF8(host_id));
+void SharedWorkerDevToolsAgent::OnAttach(const std::string& host_id,
+                                         int session_id) {
+  webworker_->attachDevTools(WebString::fromUTF8(host_id), session_id);
 }
 
 void SharedWorkerDevToolsAgent::OnReattach(const std::string& host_id,
+                                           int session_id,
                                            const std::string& state) {
-  webworker_->reattachDevTools(WebString::fromUTF8(host_id),
+  webworker_->reattachDevTools(WebString::fromUTF8(host_id), session_id,
                                WebString::fromUTF8(state));
 }
 
@@ -90,8 +95,9 @@ void SharedWorkerDevToolsAgent::OnDetach() {
 }
 
 void SharedWorkerDevToolsAgent::OnDispatchOnInspectorBackend(
+    int session_id,
     const std::string& message) {
-  webworker_->dispatchDevToolsMessage(WebString::fromUTF8(message));
+  webworker_->dispatchDevToolsMessage(session_id, WebString::fromUTF8(message));
 }
 
 bool SharedWorkerDevToolsAgent::Send(IPC::Message* message) {