Make tracing work in service manager

services/service_manager/standalone/tracer.cc

 // 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.
 
 #include "services/service_manager/standalone/tracer.h"
 
 #include <stddef.h>
 #include <stdio.h>
 #include <string.h>
 #include <utility>
@@ skipping 46 matching lines @@
   coordinator_->Start(std::move(data_pipe.producer_handle), categories_);
   drainer_.reset(new mojo::common::DataPipeDrainer(
       this, std::move(data_pipe.consumer_handle)));
 }
 
 void Tracer::StopAndFlushToFile() {
   if (tracing_)
     StopTracingAndFlushToDisk();
 }
 
-void Tracer::ConnectToProvider(tracing::mojom::ProviderRequest request) {
-  provider_.Bind(std::move(request));
-}
-
 void Tracer::StopTracingAndFlushToDisk() {
   tracing_ = false;
   trace_file_ = fopen(trace_filename_.c_str(), "w+");
   PCHECK(trace_file_);
   static const char kStart[] = "{\"traceEvents\":[";
   PCHECK(fwrite(kStart, 1, strlen(kStart), trace_file_) == strlen(kStart));
 
   // At this point we might be connected to the tracing service, in which case
   // we want to tell it to stop tracing and we will send the data we've
   // collected in process to it.
@@ skipping 75 matching lines @@
   WriteFooterAndClose();
 }
 
 void Tracer::WriteCommaIfNeeded() {
   if (first_chunk_written_)
     PCHECK(fwrite(",", 1, 1, trace_file_) == 1);
   first_chunk_written_ = true;
 }
 
 }  // namespace service_manager