[tracing] Send smaps file desciptor to child process for tracing

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 <string>
 #include <vector>
 
@@ skipping 143 matching lines @@
 
   // Returns true if at least one category in the list is enabled by this
   // trace config.
   bool IsCategoryGroupEnabled(const char* category_group) const;
 
   // Merges config with the current TraceConfig
   void Merge(const TraceConfig& config);
 
   void Clear();
 
+  bool IsDetailedMemoryDumpEnabled() const;
+
   const MemoryDumpConfig& memory_dump_config() const {
     return memory_dump_config_;
   }
 
  private:
   FRIEND_TEST_ALL_PREFIXES(TraceConfigTest, TraceConfigFromValidLegacyFormat);
   FRIEND_TEST_ALL_PREFIXES(TraceConfigTest,
                            TraceConfigFromInvalidLegacyStrings);
   FRIEND_TEST_ALL_PREFIXES(TraceConfigTest, ConstructDefaultTraceConfig);
   FRIEND_TEST_ALL_PREFIXES(TraceConfigTest, TraceConfigFromValidString);
@@ skipping 55 matching lines @@
   StringList included_categories_;
   StringList disabled_categories_;
   StringList excluded_categories_;
   StringList synthetic_delays_;
 };
 
 }  // namespace trace_event
 }  // namespace base
 
 #endif  // BASE_TRACE_EVENT_TRACE_CONFIG_H_