[DevTools] Support multiple sessions in Target domain

content/browser/devtools/devtools_agent_host_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/devtools/devtools_agent_host_impl.h"
 
 #include <map>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 169 matching lines @@
 }
 
 void DevToolsAgentHostImpl::ForceAttachClient(DevToolsAgentHostClient* client) {
   scoped_refptr<DevToolsAgentHostImpl> protect(this);
   if (!sessions_.empty())
     ForceDetachAllClients(true);
   DCHECK(sessions_.empty());
   InnerAttachClient(client);
 }
 
+void DevToolsAgentHostImpl::AttachMultiClient(DevToolsAgentHostClient* client) {
+  InnerAttachClient(client);
+}
+
 bool DevToolsAgentHostImpl::DetachClient(DevToolsAgentHostClient* client) {
   if (!SessionByClient(client))
     return false;
 
   scoped_refptr<DevToolsAgentHostImpl> protect(this);
   InnerDetachClient(client);
   return true;
 }
 
 bool DevToolsAgentHostImpl::DispatchProtocolMessage(
@@ skipping 222 matching lines @@
 }
 
 void DevToolsMessageChunkProcessor::Reset() {
   message_buffer_ = std::string();
   message_buffer_size_ = 0;
   state_cookie_ = std::string();
   last_call_id_ = 0;
 }
 
 }  // namespace content