Fix races in trace events filtering.

base/trace_event/trace_log.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_LOG_H_
 #define BASE_TRACE_EVENT_TRACE_LOG_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 385 matching lines @@
                     ProcessMemoryDump* pmd) override;
 
   // Enable/disable each category group based on the current mode_,
   // category_filter_, event_callback_ and event_callback_category_filter_.
   // Enable the category group in the enabled mode if category_filter_ matches
   // the category group, or event_callback_ is not null and
   // event_callback_category_filter_ matches the category group.
   void UpdateCategoryGroupEnabledFlags();
   void UpdateCategoryGroupEnabledFlag(size_t category_index);
 
+  void CreateFiltersForTraceConfig();
+
   // Configure synthetic delays based on the values set in the current
   // trace config.
   void UpdateSyntheticDelaysFromTraceConfig();
 
   InternalTraceOptions GetInternalOptionsFromTraceConfig(
       const TraceConfig& config);
 
   class ThreadLocalEventBuffer;
   class OptionalAutoLock;
   struct RegisteredAsyncObserver;
@@ skipping 131 matching lines @@
   subtle::AtomicWord generation_;
   bool use_worker_thread_;
 
   DISALLOW_COPY_AND_ASSIGN(TraceLog);
 };
 
 }  // namespace trace_event
 }  // namespace base
 
 #endif  // BASE_TRACE_EVENT_TRACE_LOG_H_