Standardize "net" category trace events

net/http/http_cache_transaction.cc

 // Copyright (c) 2012 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 "net/http/http_cache_transaction.h"
 
 #include "build/build_config.h"  // For OS_POSIX
 
 #if defined(OS_POSIX)
 #include <unistd.h>
@@ skipping 15 matching lines @@
 #include "base/strings/string_piece.h"
 #include "base/strings/string_util.h"  // For LowerCaseEqualsASCII.
 #include "base/strings/stringprintf.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/time/clock.h"
 #include "base/trace_event/trace_event.h"
 #include "base/values.h"
 #include "net/base/auth.h"
 #include "net/base/load_flags.h"
 #include "net/base/load_timing_info.h"
+#include "net/base/trace_constants.h"
 #include "net/base/upload_data_stream.h"
 #include "net/cert/cert_status_flags.h"
 #include "net/cert/x509_certificate.h"
 #include "net/disk_cache/disk_cache.h"
 #include "net/http/http_network_session.h"
 #include "net/http/http_request_info.h"
 #include "net/http/http_util.h"
 #include "net/log/net_log_event_type.h"
 #include "net/ssl/ssl_cert_request_info.h"
 #include "net/ssl/ssl_config_service.h"
@@ skipping 1212 matching lines @@
   // transaction then metadata will be written to cache twice. If prefetching
   // becomes more common, consider combining the writes.
 
   next_state_ = STATE_TOGGLE_UNUSED_SINCE_PREFETCH_COMPLETE;
   return WriteResponseInfoToEntry(false);
 }
 
 int HttpCache::Transaction::DoCacheToggleUnusedSincePrefetchComplete(
     int result) {
   TRACE_EVENT0(
-      "net", "HttpCacheTransaction::DoCacheToggleUnusedSincePrefetchComplete");
+      kNetTracingCategory,
+      "HttpCacheTransaction::DoCacheToggleUnusedSincePrefetchComplete");
   // Restore the original value for this transaction.
   response_.unused_since_prefetch = !response_.unused_since_prefetch;
   next_state_ = STATE_CACHE_DISPATCH_VALIDATION;
   return OnWriteResponseInfoToEntryComplete(result);
 }
 
 int HttpCache::Transaction::DoCacheDispatchValidation() {
   TRACE_EVENT0("io", "HttpCacheTransaction::DoCacheDispatchValidation");
   // We now have access to the cache entry.
   //
@@ skipping 1710 matching lines @@
     default:
       NOTREACHED();
   }
 }
 
 void HttpCache::Transaction::OnIOComplete(int result) {
   DoLoop(result);
 }
 
 }  // namespace net