[tracing] Add filtering mode in TraceLog

base/trace_event/trace_config.h

 // 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.
 
 #ifndef BASE_TRACE_EVENT_TRACE_CONFIG_H_
 #define BASE_TRACE_EVENT_TRACE_CONFIG_H_
 
 #include <stdint.h>
 
 #include <set>
@@ skipping 53 matching lines @@
 
       // Reset the options to default.
       void Clear();
 
       uint32_t breakdown_threshold_bytes;
     };
 
     // Reset the values in the config.
     void Clear();
 
+    void Merge(const MemoryDumpConfig& config);
+
     // Set of memory dump modes allowed for the tracing session. The explicitly
     // triggered dumps will be successful only if the dump mode is allowed in
     // the config.
     std::set<MemoryDumpLevelOfDetail> allowed_dump_modes;
 
     std::vector<Trigger> triggers;
     HeapProfiler heap_profiler_options;
   };
 
   class EventFilterConfig {
@@ skipping 149 matching lines @@
   void Clear();
 
   // Clears and resets the memory dump config.
   void ResetMemoryDumpConfig(const MemoryDumpConfig& memory_dump_config);
 
   const MemoryDumpConfig& memory_dump_config() const {
     return memory_dump_config_;
   }
 
   const EventFilters& event_filters() const { return event_filters_; }
+  void SetEventFilterConfigs(const EventFilters& filter_configs) {
+    event_filters_ = filter_configs;
+  }
 
  private:
   FRIEND_TEST_ALL_PREFIXES(TraceConfigTest, TraceConfigFromValidLegacyFormat);
   FRIEND_TEST_ALL_PREFIXES(TraceConfigTest,
                            TraceConfigFromInvalidLegacyStrings);
   FRIEND_TEST_ALL_PREFIXES(TraceConfigTest, TraceConfigFromValidString);
   FRIEND_TEST_ALL_PREFIXES(TraceConfigTest, TraceConfigFromInvalidString);
   FRIEND_TEST_ALL_PREFIXES(TraceConfigTest,
                            IsEmptyOrContainsLeadingOrTrailingWhitespace);
   FRIEND_TEST_ALL_PREFIXES(TraceConfigTest, TraceConfigFromMemoryConfigString);
@@ skipping 59 matching lines @@
   StringList disabled_categories_;
   StringList excluded_categories_;
   StringList synthetic_delays_;
   EventFilters event_filters_;
 };
 
 }  // namespace trace_event
 }  // namespace base
 
 #endif  // BASE_TRACE_EVENT_TRACE_CONFIG_H_