[DevTools] Migrate DevToolsTracingHandler to generated handler.

content/browser/devtools/protocol/devtools_protocol_client.h

 // Copyright 2014 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_PROTOCOL_DEVTOOLS_PROTOCOL_CLIENT_H_
 #define CONTENT_BROWSER_DEVTOOLS_PROTOCOL_DEVTOOLS_PROTOCOL_CLIENT_H_
 
 #include "content/browser/devtools/devtools_protocol.h"
 
 namespace content {
 
 class DevToolsProtocolClient {
  public:
   typedef base::Callback<void(const std::string& event,
                               base::DictionaryValue* params)> EventCallback;
 
   typedef base::Callback<void(scoped_refptr<DevToolsProtocol::Response>)>
       ResponseCallback;
 
+  typedef base::Callback<void(const std::string& message)>
+      RawMessageCallback;
+
   enum ResponseStatus {
     RESPONSE_STATUS_FALLTHROUGH,
     RESPONSE_STATUS_OK,
     RESPONSE_STATUS_INVALID_PARAMS,
     RESPONSE_STATUS_INTERNAL_ERROR,
     RESPONSE_STATUS_SERVER_ERROR,
   };
 
   struct Response {
    public:
@@ skipping 16 matching lines @@
   void SendInvalidParamsResponse(
       scoped_refptr<DevToolsProtocol::Command> command,
       const std::string& message);
   void SendInternalErrorResponse(
       scoped_refptr<DevToolsProtocol::Command> command,
       const std::string& message);
   void SendServerErrorResponse(
       scoped_refptr<DevToolsProtocol::Command> command,
       const std::string& message);
 
+  // Sends message to client, the caller is presumed to properly
+  // format the message. Do not use unless you must.
+  void SendRawMessage(const std::string& message);
+
  protected:
   DevToolsProtocolClient(const EventCallback& event_callback,
-                         const ResponseCallback& response_callback);
+                         const ResponseCallback& response_callback,
+                         const RawMessageCallback& raw_message_callback);

[caseq, 2014/10/13 13:01:27]

Let's have one callback instead of three, i.e. just RawMessageCallback and
implement others on top of it.

[dgozman, 2014/10/14 12:42:22]

Done.

 
   virtual ~DevToolsProtocolClient();
 
   void SendNotification(const std::string& method,
                         base::DictionaryValue* params);
 
   void SendAsyncResponse(scoped_refptr<DevToolsProtocol::Response> response);
 
  private:
   EventCallback event_callback_;
   ResponseCallback response_callback_;
+  RawMessageCallback raw_message_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(DevToolsProtocolClient);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DEVTOOLS_PROTOCOL_DEVTOOLS_PROTOCOL_CLIENT_H_