Revert of [DevTools] Filter any messages from previous sessions in DevToolsAgentHostImpl

content/browser/devtools/devtools_agent_host_impl.cc

Index: content/browser/devtools/devtools_agent_host_impl.cc
diff --git a/content/browser/devtools/devtools_agent_host_impl.cc b/content/browser/devtools/devtools_agent_host_impl.cc
index 28318e043b921197a4a015d29883f6dfdbc4fd92..4d935519c07e0fa2ee919e11ee9ec83bf5e751c8 100644
--- a/content/browser/devtools/devtools_agent_host_impl.cc
+++ b/content/browser/devtools/devtools_agent_host_impl.cc
@@ -76,7 +76,8 @@
 }
 
 DevToolsAgentHostImpl::DevToolsAgentHostImpl()
-    : id_(base::GenerateGUID()), session_id_(0), client_(NULL) {
+    : id_(base::GenerateGUID()),
+      client_(NULL) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   g_instances.Get()[id_] = this;
 }
@@ -105,7 +106,6 @@
 
 void DevToolsAgentHostImpl::AttachClient(DevToolsAgentHostClient* client) {
   scoped_refptr<DevToolsAgentHostImpl> protect(this);
-  ++session_id_;
   if (client_) {
     client_->AgentHostClosed(this, true);
     InnerDetach();
@@ -151,16 +151,6 @@
 }
 
 void DevToolsAgentHostImpl::ConnectWebContents(WebContents* wc) {
-}
-
-void DevToolsAgentHostImpl::SendProtocolResponse(int session_id,
-                                                 const std::string& message) {
-  SendMessageToClient(session_id, message);
-}
-
-void DevToolsAgentHostImpl::SendProtocolNotification(
-    const std::string& message) {
-  SendMessageToClient(session_id(), message);
 }
 
 void DevToolsAgentHostImpl::HostClosed() {
@@ -174,12 +164,8 @@
   client->AgentHostClosed(this, false);
 }
 
-void DevToolsAgentHostImpl::SendMessageToClient(int session_id,
-                                                const std::string& message) {
+void DevToolsAgentHostImpl::SendMessageToClient(const std::string& message) {
   if (!client_)
-    return;
-  // Filter any messages from previous sessions.
-  if (session_id != session_id_)
     return;
   client_->DispatchProtocolMessage(this, message);
 }
@@ -263,7 +249,7 @@
 
   if (chunk.is_first && chunk.is_last) {
     CHECK(message_buffer_size_ == 0);
-    callback_.Run(chunk.session_id, chunk.data);
+    callback_.Run(chunk.data);
     return;
   }
 
@@ -279,7 +265,7 @@
 
   if (chunk.is_last) {
     CHECK(message_buffer_.size() == message_buffer_size_);
-    callback_.Run(chunk.session_id, message_buffer_);
+    callback_.Run(message_buffer_);
     message_buffer_ = std::string();
     message_buffer_size_ = 0;
   }