Background tracing: Added preset category for blink_style

content/browser/tracing/background_tracing_manager_impl.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 "content/browser/tracing/background_tracing_manager_impl.h"
 
 #include "base/cpu.h"
 #include "base/json/json_writer.h"
 #include "base/macros.h"
 #include "base/metrics/histogram_macros.h"
@@ skipping 532 matching lines @@
       return "*,disabled-by-default-benchmark.detailed,"
              "disabled-by-default-v8.cpu_profile";
     case BackgroundTracingConfigImpl::CategoryPreset::BENCHMARK_GPU:
       return "benchmark,toplevel,gpu";
     case BackgroundTracingConfigImpl::CategoryPreset::BENCHMARK_IPC:
       return "benchmark,toplevel,ipc";
     case BackgroundTracingConfigImpl::CategoryPreset::BENCHMARK_STARTUP:
       return "benchmark,toplevel,startup,disabled-by-default-file,"
              "disabled-by-default-toplevel.flow,"
              "disabled-by-default-ipc.flow";
+    case BackgroundTracingConfigImpl::CategoryPreset::BLINK_STYLE:
+      return "blink_style";
   }
   NOTREACHED();
   return "";
 }
 
 }  // namspace content