DevTools: provide an option to return traces as streams

content/browser/devtools/protocol/tracing_handler.h

Index: content/browser/devtools/protocol/tracing_handler.h
diff --git a/content/browser/devtools/protocol/tracing_handler.h b/content/browser/devtools/protocol/tracing_handler.h
index 4a80351a0e700eb53df113b72f64463e8590a295..ab50c334d17c7ac9745d62108fdf11d424d334b6 100644
--- a/content/browser/devtools/protocol/tracing_handler.h
+++ b/content/browser/devtools/protocol/tracing_handler.h
@@ -20,6 +20,9 @@ class Timer;
 
 namespace content {
 namespace devtools {
+
+class DevToolsIOContext;
+
 namespace tracing {
 
 class TracingHandler {
@@ -27,7 +30,7 @@ class TracingHandler {
   typedef DevToolsProtocolClient::Response Response;
 
   enum Target { Browser, Renderer };
-  explicit TracingHandler(Target target);
+  TracingHandler(Target target, DevToolsIOContext* io_context);
   virtual ~TracingHandler();
 
   void SetClient(scoped_ptr<Client> client);
@@ -35,14 +38,18 @@ class TracingHandler {
 
   void OnTraceDataCollected(const std::string& trace_fragment);
   void OnTraceComplete();
+  void OnTraceToStreamComplete(const std::string& stream_id);
 
+  // Protocol methods.
   Response Start(DevToolsCommandId command_id,
                  const std::string* categories,
                  const std::string* options,
                  const double* buffer_usage_reporting_interval);
   Response End(DevToolsCommandId command_id);
+  Response End(DevToolsCommandId command_id, const bool* return_as_stream);
   Response GetCategories(DevToolsCommandId command);
   Response RequestMemoryDump(DevToolsCommandId command_id);
+
   bool did_initiate_recording() { return did_initiate_recording_; }
 
  private:
@@ -57,7 +64,8 @@ class TracingHandler {
 
   void SetupTimer(double usage_reporting_interval);
 
-  void DisableRecording(bool abort);
+  void DisableRecording(
+      const scoped_refptr<TracingController::TraceDataSink>& trace_data_sink);
 
   bool IsRecording() const;
 
@@ -66,6 +74,7 @@ class TracingHandler {
 
   scoped_ptr<Client> client_;
   bool did_initiate_recording_;
+  DevToolsIOContext* io_context_;
   base::WeakPtrFactory<TracingHandler> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(TracingHandler);