[DevTools] Move IO and Tracing to new generator.

content/browser/devtools/protocol/tracing_handler.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_TRACING_HANDLER_H_
 #define CONTENT_BROWSER_DEVTOOLS_PROTOCOL_TRACING_HANDLER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <set>
 #include <string>
 
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/trace_event/trace_event.h"
-#include "content/browser/devtools/protocol/devtools_protocol_dispatcher.h"
+#include "content/browser/devtools/protocol/tracing.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/tracing_controller.h"
 
 namespace base {
 class Timer;
 }
 
 namespace content {
-namespace devtools {
 
 class DevToolsIOContext;
 
-namespace tracing {
+namespace protocol {
 
-class TracingHandler {
+class TracingHandler : public Tracing::Backend {
  public:
-  typedef DevToolsProtocolClient::Response Response;
-
   enum Target { Browser, Renderer };
   TracingHandler(Target target,
                  int frame_tree_node_id,
                  DevToolsIOContext* io_context);
-  virtual ~TracingHandler();
+  ~TracingHandler() override;
 
-  void SetClient(std::unique_ptr<Client> client);
-  void Detached();
+  void Wire(UberDispatcher*);
+  Response Disable() override;
 
   void OnTraceDataCollected(const std::string& trace_fragment);
   void OnTraceComplete();
   void OnTraceToStreamComplete(const std::string& stream_handle);
 
   // Protocol methods.
-  Response Start(DevToolsCommandId command_id,
-                 const std::string* categories,
-                 const std::string* options,
-                 const double* buffer_usage_reporting_interval,
-                 const std::string* transfer_mode,
-                 const std::unique_ptr<base::DictionaryValue>& config);
-  Response End(DevToolsCommandId command_id);
-  Response GetCategories(DevToolsCommandId command);
-  Response RequestMemoryDump(DevToolsCommandId command_id);
-  Response RecordClockSyncMarker(const std::string& sync_id);
+  void Start(Maybe<std::string> categories,
+             Maybe<std::string> options,
+             Maybe<double> buffer_usage_reporting_interval,
+             Maybe<std::string> transfer_mode,
+             Maybe<Tracing::TraceConfig> config,
+             std::unique_ptr<StartCallback> callback) override;
+  void End(std::unique_ptr<EndCallback> callback) override;
+  void GetCategories(std::unique_ptr<GetCategoriesCallback> callback) override;
+  void RequestMemoryDump(
+      std::unique_ptr<RequestMemoryDumpCallback> callback) override;
+  Response RecordClockSyncMarker(const std::string& sync_id) override;
 
   bool did_initiate_recording() { return did_initiate_recording_; }
 
  private:
-  void OnRecordingEnabled(DevToolsCommandId command_id);
+  void OnRecordingEnabled(std::unique_ptr<StartCallback> callback);
   void OnBufferUsage(float percent_full, size_t approximate_event_count);
-  void OnCategoriesReceived(DevToolsCommandId command_id,
+  void OnCategoriesReceived(std::unique_ptr<GetCategoriesCallback> callback,
                             const std::set<std::string>& category_set);
-  void OnMemoryDumpFinished(DevToolsCommandId command_id,
+  void OnMemoryDumpFinished(std::unique_ptr<RequestMemoryDumpCallback> callback,
                             uint64_t dump_guid,
                             bool success);
 
   void SetupTimer(double usage_reporting_interval);
   void StopTracing(
       const scoped_refptr<TracingController::TraceDataSink>& trace_data_sink);
   bool IsTracing() const;
   static bool IsStartupTracingActive();
   CONTENT_EXPORT static base::trace_event::TraceConfig
       GetTraceConfigFromDevToolsConfig(
           const base::DictionaryValue& devtools_config);
 
   std::unique_ptr<base::Timer> buffer_usage_poll_timer_;
   Target target_;
 
-  std::unique_ptr<Client> client_;
+  std::unique_ptr<Tracing::Frontend> frontend_;
   DevToolsIOContext* io_context_;
   int frame_tree_node_id_;
   bool did_initiate_recording_;
   bool return_as_stream_;
   base::WeakPtrFactory<TracingHandler> weak_factory_;
 
   FRIEND_TEST_ALL_PREFIXES(TracingHandlerTest,
                            GetTraceConfigFromDevToolsConfig);
   DISALLOW_COPY_AND_ASSIGN(TracingHandler);
 };
 
-}  // namespace tracing
-}  // namespace devtools
+}  // namespace protocol
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DEVTOOLS_PROTOCOL_TRACING_HANDLER_H_