[DevTools] Move IO and Tracing to new generator.

content/browser/devtools/protocol/io_handler.h

 // Copyright 2015 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_IO_HANDLER_H_
 #define CONTENT_BROWSER_DEVTOOLS_PROTOCOL_IO_HANDLER_H_
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
-#include "content/browser/devtools/protocol/devtools_protocol_dispatcher.h"
+#include "content/browser/devtools/protocol/io.h"
 
 namespace base {
 class RefCountedString;
 }
 
 namespace content {
-namespace devtools {
 class DevToolsIOContext;
 
-namespace io {
+namespace protocol {
 
-class IOHandler {
+class IOHandler : public IO::Backend {
  public:
-  using Response = DevToolsProtocolClient::Response;
+  explicit IOHandler(DevToolsIOContext* io_context);
+  ~IOHandler() override;
 
-  explicit IOHandler(DevToolsIOContext* io_context);
-  ~IOHandler();
-
-  void SetClient(std::unique_ptr<Client> client);
+  void Wire(UberDispatcher*);
+  Response Disable() override;
 
   // Protocol methods.
-  Response Read(DevToolsCommandId command_id, const std::string& handle,
-      const int* offset, const int* max_size);
-  Response Close(const std::string& handle);
+  void Read(
+      const std::string& handle,
+      Maybe<int> offset,
+      Maybe<int> max_size,
+      std::unique_ptr<ReadCallback> callback) override;
+  Response Close(const std::string& handle) override;
 
  private:
-  void ReadComplete(DevToolsCommandId command_id,
+  void ReadComplete(std::unique_ptr<ReadCallback> callback,
       const scoped_refptr<base::RefCountedString>& data, int status);
 
-  std::unique_ptr<Client> client_;
+  std::unique_ptr<IO::Frontend> frontend_;
   DevToolsIOContext* io_context_;
   base::WeakPtrFactory<IOHandler> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(IOHandler);
 };
 
-}  // namespace io
-}  // namespace devtools
+}  // namespace protocol
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DEVTOOLS_PROTOCOL_TRACING_HANDLER_H_