Set up background memory light tracing field trials

content/browser/tracing/background_tracing_config_unittest.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 <memory>
 
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
 #include "base/values.h"
 #include "content/browser/tracing/background_tracing_config_impl.h"
@@ skipping 266 matching lines @@
       "\"MONITOR_AND_DUMP_WHEN_TRIGGER_NAMED\", \"trigger_name\":\"foo\"}]}");
 
   BackgroundTracingConfigImpl::CategoryPreset categories[] = {
       BackgroundTracingConfigImpl::BENCHMARK,
       BackgroundTracingConfigImpl::BENCHMARK_DEEP,
       BackgroundTracingConfigImpl::BENCHMARK_GPU,
       BackgroundTracingConfigImpl::BENCHMARK_IPC,
       BackgroundTracingConfigImpl::BENCHMARK_STARTUP,
       BackgroundTracingConfigImpl::BENCHMARK_BLINK_GC,
       BackgroundTracingConfigImpl::BENCHMARK_MEMORY_HEAVY,
+      BackgroundTracingConfigImpl::BENCHMARK_MEMORY_LIGHT,
       BackgroundTracingConfigImpl::BENCHMARK_EXECUTION_METRIC,
       BackgroundTracingConfigImpl::BLINK_STYLE,
   };
 
   const char* category_strings[] = {"BENCHMARK",
                                     "BENCHMARK_DEEP",
                                     "BENCHMARK_GPU",
                                     "BENCHMARK_IPC",
                                     "BENCHMARK_STARTUP",
                                     "BENCHMARK_BLINK_GC",
                                     "BENCHMARK_MEMORY_HEAVY",
+                                    "BENCHMARK_MEMORY_LIGHT",
                                     "BENCHMARK_EXECUTION_METRIC",
                                     "BLINK_STYLE"};
   for (size_t i = 0;
        i <
        sizeof(categories) / sizeof(BackgroundTracingConfigImpl::CategoryPreset);
        i++) {
     config->set_category_preset(categories[i]);
     std::string expected =
         std::string("{\"category\":\"") + category_strings[i] +
         std::string(
@@ skipping 310 matching lines @@
         ConfigToString(config.get()),
         "{\"configs\":[{\"category\":\"BENCHMARK_DEEP\",\"rule\":\"TRACE_"
         "ON_NAVIGATION_UNTIL_TRIGGER_OR_FULL\",\"trigger_delay\":30,"
         "\"trigger_name\":\"foo1\"},{\"category\":\"BENCHMARK_DEEP\",\"rule\":"
         "\"TRACE_ON_NAVIGATION_UNTIL_TRIGGER_OR_FULL\",\"trigger_delay\":30,"
         "\"trigger_name\":\"foo2\"}],\"mode\":\"REACTIVE_TRACING_MODE\"}");
   }
 }
 
 }  // namspace content