[DevTools] filter any messages from previous session in DevToolsAgentHostImpl

third_party/WebKit/public/web/WebDevToolsAgentClient.h

Index: third_party/WebKit/public/web/WebDevToolsAgentClient.h
diff --git a/third_party/WebKit/public/web/WebDevToolsAgentClient.h b/third_party/WebKit/public/web/WebDevToolsAgentClient.h
index f6743587af03c5e3101a48c672485e80e0e56fd9..fa8c9b70473a92e8684b76377f71d97702aeccf7 100644
--- a/third_party/WebKit/public/web/WebDevToolsAgentClient.h
+++ b/third_party/WebKit/public/web/WebDevToolsAgentClient.h
@@ -44,7 +44,7 @@ class WebDevToolsAgentClient {
 public:
     // Sends response message over the protocol, update agent state on the browser side for
     // potential re-attach. |callId| for notifications is 0, |state| for notifications is empty.
-    virtual void sendProtocolMessage(int callId, const WebString& response, const WebString& state) { }
+    virtual void sendProtocolMessage(int sessionId, int callId, const WebString& response, const WebString& state) { }
 
     // Returns process id.
     virtual long processId() { return -1; }