Background tracing: Added preset category for blink_style

content/browser/tracing/background_tracing_config_impl.cc

Index: content/browser/tracing/background_tracing_config_impl.cc
diff --git a/content/browser/tracing/background_tracing_config_impl.cc b/content/browser/tracing/background_tracing_config_impl.cc
index cc944ce90ef6a624284c8c43f8fbf29d0f9d2a2f..9e201eba7c97d23b01f9961847e0d4180d5d32a3 100644
--- a/content/browser/tracing/background_tracing_config_impl.cc
+++ b/content/browser/tracing/background_tracing_config_impl.cc
@@ -23,6 +23,7 @@ const char kConfigCategoryBenchmarkDeep[] = "BENCHMARK_DEEP";
 const char kConfigCategoryBenchmarkGPU[] = "BENCHMARK_GPU";
 const char kConfigCategoryBenchmarkIPC[] = "BENCHMARK_IPC";
 const char kConfigCategoryBenchmarkStartup[] = "BENCHMARK_STARTUP";
+const char kConfigCategoryBlinkStyle[] = "BLINK_STYLE";
 
 }  // namespace
 
@@ -46,6 +47,8 @@ std::string BackgroundTracingConfigImpl::CategoryPresetToString(
       return kConfigCategoryBenchmarkIPC;
     case BackgroundTracingConfigImpl::BENCHMARK_STARTUP:
       return kConfigCategoryBenchmarkStartup;
+    case BackgroundTracingConfigImpl::BLINK_STYLE:
+      return kConfigCategoryBlinkStyle;
   }
   NOTREACHED();
   return "";
@@ -79,6 +82,11 @@ bool BackgroundTracingConfigImpl::StringToCategoryPreset(
     return true;
   }
 
+  if (category_preset_string == kConfigCategoryBlinkStyle) {
+    *category_preset = BackgroundTracingConfigImpl::BLINK_STYLE;
+    return true;
+  }
+
   return false;
 }