Tracing pre-filtering

base/trace_event/trace_config.h

Index: base/trace_event/trace_config.h
diff --git a/base/trace_event/trace_config.h b/base/trace_event/trace_config.h
index 72ca5f868785691b7686fef576f6eb59218c4592..8d9838acaf3874b743241e3540449f00b476433d 100644
--- a/base/trace_event/trace_config.h
+++ b/base/trace_event/trace_config.h
@@ -46,9 +46,24 @@ class BASE_EXPORT TraceConfig {
     uint32_t periodic_interval_ms;
     MemoryDumpLevelOfDetail level_of_detail;
   };
-
   typedef std::vector<MemoryDumpTriggerConfig> MemoryDumpConfig;
 
+  struct CategoryEventFilterConfig {
+    CategoryEventFilterConfig();
+    ~CategoryEventFilterConfig();
+
+    CategoryEventFilterConfig(const CategoryEventFilterConfig& tc);
+    CategoryEventFilterConfig& operator=(const CategoryEventFilterConfig& rhs);
+
+    bool IsCategoryGroupEnabled(const char* category_group_name) const;
+
+    std::string predicate_name;
+    StringList included_categories;
+    StringList excluded_categories;
+    std::unique_ptr<base::DictionaryValue> args;
+  };
+  typedef std::vector<CategoryEventFilterConfig> CategoryEventFilters;
+
   TraceConfig();
 
   // Create TraceConfig object from category filter and trace options strings.
@@ -143,6 +158,8 @@ class BASE_EXPORT TraceConfig {
   // Return a list of the synthetic delays specified in this category filter.
   const StringList& GetSyntheticDelayValues() const;
 
+  const CategoryEventFilters& GetCategoryEventFilters() const;
+
   TraceRecordMode GetTraceRecordMode() const { return record_mode_; }
   bool IsSamplingEnabled() const { return enable_sampling_; }
   bool IsSystraceEnabled() const { return enable_systrace_; }
@@ -165,7 +182,7 @@ class BASE_EXPORT TraceConfig {
 
   // Returns true if at least one category in the list is enabled by this
   // trace config.
-  bool IsCategoryGroupEnabled(const char* category_group) const;
+  bool IsCategoryGroupEnabled(const char* category_group_name) const;
 
   // Merges config with the current TraceConfig
   void Merge(const TraceConfig& config);
@@ -214,6 +231,8 @@ class BASE_EXPORT TraceConfig {
   void SetMemoryDumpConfig(const base::DictionaryValue& memory_dump_config);
   void SetDefaultMemoryDumpConfig();
 
+  void SetCategoryEventFilters(const base::ListValue& category_event_filters);
+
   // Convert TraceConfig to the dict representation of the TraceConfig.
   void ToDict(base::DictionaryValue& dict) const;
 
@@ -244,6 +263,7 @@ class BASE_EXPORT TraceConfig {
   StringList disabled_categories_;
   StringList excluded_categories_;
   StringList synthetic_delays_;
+  CategoryEventFilters category_event_filters_;
 };
 
 }  // namespace trace_event