Skip default categories when getting known categories.

base/debug/trace_event_unittest.cc

 // 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.
 
 #include "base/debug/trace_event_unittest.h"
 
 #include <cstdlib>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 845 matching lines @@
   BeginTrace();
   TRACE_EVENT_INSTANT0("c3", "name");
   TRACE_EVENT_INSTANT0("c4", "name");
   EndTraceAndFlush();
   std::vector<std::string> cats;
   TraceLog::GetInstance()->GetKnownCategories(&cats);
   EXPECT_TRUE(std::find(cats.begin(), cats.end(), "c1") != cats.end());
   EXPECT_TRUE(std::find(cats.begin(), cats.end(), "c2") != cats.end());
   EXPECT_TRUE(std::find(cats.begin(), cats.end(), "c3") != cats.end());
   EXPECT_TRUE(std::find(cats.begin(), cats.end(), "c4") != cats.end());
-
+  // Make sure metadata isn't returned.
+  EXPECT_TRUE(std::find(cats.begin(), cats.end(), "__metadata") == cats.end());
   const std::vector<std::string> empty_categories;
   std::vector<std::string> included_categories;
   std::vector<std::string> excluded_categories;
 
   // Test that category filtering works.
 
   // Include nonexistent category -> no events
   Clear();
   included_categories.clear();
   included_categories.push_back("not_found823564786");
@@ skipping 728 matching lines @@
   TRACE_EVENT_INSTANT0("all", "after callback removed");
   EXPECT_EQ(2u, collected_events_.size());
   EXPECT_EQ("event1", collected_events_[0]);
   EXPECT_EQ("event2", collected_events_[1]);
 }
 
 // TODO(dsinclair): Continuous Tracing unit test.
 
 }  // namespace debug
 }  // namespace base