[Devtools] Allow User-Agent header override for Websockets

content/browser/devtools/devtools_agent_host_impl.h

 // 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.
 
 #ifndef CONTENT_BROWSER_DEVTOOLS_DEVTOOLS_AGENT_HOST_IMPL_H_
 #define CONTENT_BROWSER_DEVTOOLS_DEVTOOLS_AGENT_HOST_IMPL_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 35 matching lines @@
   BrowserContext* GetBrowserContext() override;
   WebContents* GetWebContents() override;
   void DisconnectWebContents() override;
   void ConnectWebContents(WebContents* wc) override;
 
   // DevToolsProtocolDelegate implementation.
   void SendProtocolResponse(int session_id,
                             const std::string& message) override;
   void SendProtocolNotification(const std::string& message) override;
 
+  std::string GetUserAgentOverride() override;
+
  protected:
   DevToolsAgentHostImpl();
   ~DevToolsAgentHostImpl() override;
 
   void HostClosed();
   void SendMessageToClient(int session_id, const std::string& message);
   devtools::DevToolsIOContext* GetIOContext() { return &io_context_; }
 
   int session_id() { DCHECK(client_); return session_id_; }
 
@@ skipping 24 matching lines @@
   SendMessageCallback callback_;
   std::string message_buffer_;
   uint32_t message_buffer_size_;
   std::string state_cookie_;
   int last_call_id_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DEVTOOLS_DEVTOOLS_AGENT_HOST_IMPL_H_