Trace category groups and category filter.

content/browser/trace_controller_impl.h

 // Copyright (c) 2012 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 CONTENT_BROWSER_TRACE_CONTROLLER_IMPL_H_
 #define CONTENT_BROWSER_TRACE_CONTROLLER_IMPL_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 13 matching lines @@
 
   // Called on the main thread of the browser process to initialize
   // startup tracing.
   void InitStartupTracing(const CommandLine& command_line);
 
   // Get set of known categories. This can change as new code paths are reached.
   // If true is returned, subscriber->OnKnownCategoriesCollected will be called
   // once the categories are retrieved from child processes.
   bool GetKnownCategoriesAsync(TraceSubscriber* subscriber);
 
-  // Same as above, but specifies which categories to trace.
-  // If both included_categories and excluded_categories are empty,
-  //   all categories are traced.
-  // Else if included_categories is non-empty, only those are traced.
-  // Else if excluded_categories is non-empty, everything but those are traced.
+  // Same as above, but specifies which categories to trace using tag
+  // patterns.
+  // If both included_tag_patterns and excluded_tag_patterns are empty, all
+  // categories are traced.
+  // Else if included_tag_patterns is non-empty, only those categories that
+  // contain a matching tag, are traced.
+  // Else if excluded_tag_patterns is non-empty, everything but those
+  // categories that have a matching tag are traced.
   bool BeginTracing(TraceSubscriber* subscriber,
-                    const std::vector<std::string>& included_categories,
-                    const std::vector<std::string>& excluded_categories);
+                    const std::vector<std::string>& included_tag_patterns,
+                    const std::vector<std::string>& excluded_tag_patterns);
 
   // TraceController implementation:
   virtual bool BeginTracing(TraceSubscriber* subscriber,
-                            const std::string& categories) OVERRIDE;
+                            const std::string& tag_patterns) OVERRIDE;
   virtual  bool EndTracingAsync(TraceSubscriber* subscriber) OVERRIDE;
   virtual bool GetTraceBufferPercentFullAsync(
       TraceSubscriber* subscriber) OVERRIDE;
   virtual bool SetWatchEvent(TraceSubscriber* subscriber,
                              const std::string& category_name,
                              const std::string& event_name) OVERRIDE;
   virtual bool CancelWatchEvent(TraceSubscriber* subscriber) OVERRIDE;
   virtual void CancelSubscriber(TraceSubscriber* subscriber) OVERRIDE;
 
  private:
@@ skipping 39 matching lines @@
   FilterMap filters_;
   TraceSubscriber* subscriber_;
   // Pending acks for EndTracingAsync:
   int pending_end_ack_count_;
   // Pending acks for GetTraceBufferPercentFullAsync:
   int pending_bpf_ack_count_;
   float maximum_bpf_;
   bool is_tracing_;
   bool is_get_categories_;
   std::set<std::string> known_categories_;
-  std::vector<std::string> included_categories_;
-  std::vector<std::string> excluded_categories_;
+  std::vector<std::string> included_tag_patterns_;
+  std::vector<std::string> excluded_tag_patterns_;
   std::string watch_category_;
   std::string watch_name_;
 
   DISALLOW_COPY_AND_ASSIGN(TraceControllerImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_TRACE_CONTROLLER_IMPL_H_