Standardize "net" category trace events

net/proxy/proxy_resolver_v8_tracing.cc

 // Copyright (c) 2013 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/proxy/proxy_resolver_v8_tracing.h"
 
 #include <map>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/stringprintf.h"
 #include "base/synchronization/cancellation_flag.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/thread.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/trace_event/trace_event.h"
 #include "net/base/address_list.h"
 #include "net/base/net_errors.h"
 #include "net/base/network_interfaces.h"
+#include "net/base/trace_constants.h"
 #include "net/dns/host_resolver.h"
 #include "net/log/net_log_with_source.h"
 #include "net/proxy/proxy_info.h"
 #include "net/proxy/proxy_resolver_error_observer.h"
 #include "net/proxy/proxy_resolver_v8.h"
 
 // The intent of this class is explained in the design document:
 // https://docs.google.com/a/chromium.org/document/d/16Ij5OcVnR3s0MH4Z5XkhI9VTPoMJdaBn9rKreAmGOdE/edit
 //
 // In a nutshell, PAC scripts are Javascript programs and may depend on
@@ skipping 519 matching lines @@
     return;
   }
 
   if (abandoned_)
     return;
 
   NotifyCaller(result);
 }
 
 int Job::ExecuteProxyResolver() {
-  TRACE_EVENT0("net", "Job::ExecuteProxyResolver");
+  TRACE_EVENT0(kNetTracingCategory, "Job::ExecuteProxyResolver");
   int result = ERR_UNEXPECTED;  // Initialized to silence warnings.
 
   switch (operation_) {
     case CREATE_V8_RESOLVER: {
       std::unique_ptr<ProxyResolverV8> resolver;
       result = ProxyResolverV8::Create(script_data_, this, &resolver);
       if (result == OK)
         *resolver_out_ = std::move(resolver);
       break;
     }
@@ skipping 531 matching lines @@
 
 }  // namespace
 
 // static
 std::unique_ptr<ProxyResolverV8TracingFactory>
 ProxyResolverV8TracingFactory::Create() {
   return base::WrapUnique(new ProxyResolverV8TracingFactoryImpl());
 }
 
 }  // namespace net