Add support for TraceEvent before the native library is loaded.

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 <math.h>
 #include <cstdlib>
 
 #include "base/bind.h"
@@ skipping 2992 matching lines @@
   filter1.Merge(filter2);
   EXPECT_EQ(2u, filter1.GetSyntheticDelayValues().size());
 }
 
 TEST_F(TraceEventTestFixture, SyntheticDelayConfigurationToString) {
   const char config[] = "DELAY(test.Delay;16;oneshot)";
   CategoryFilter filter(config);
   EXPECT_EQ(config, filter.ToString());
 }
 
+TEST_F(TraceEventTestFixture, AddCustomTraceEvent) {
+  TraceLog* const tracer = TraceLog::GetInstance();
+  // Make sure old events are flushed.
+  EndTraceAndFlush();
+  EXPECT_EQ(0u, tracer->GetEventsSize());
+  const unsigned char* category_group_enabled =
+      TRACE_EVENT_API_GET_CATEGORY_GROUP_ENABLED("Java");
+
+  {
+    BeginTrace();
+    EXPECT_TRUE(TraceLog::IsCategoryGroupEnabledForRecordingMode(
+                    category_group_enabled));
+    TraceEventHandle handle = tracer->AddCustomTraceEvent(
+        TRACE_EVENT_PHASE_BEGIN, category_group_enabled, "name1", 0,
+        base::TimeTicks::Now());
+    size_t num_events = tracer->GetEventsSize();
+    EXPECT_GT(num_events, 1u);
+    const TraceEvent* event1 = tracer->GetEventByHandle(handle);
+    ASSERT_TRUE(event1);
+    EXPECT_STREQ("name1", event1->name());
+    EXPECT_TRUE(event1->parameter_copy_storage() != NULL);
+    EXPECT_GT(event1->parameter_copy_storage()->size(), 0u);
+    EndTraceAndFlush();
+  }
+}
+
 TEST(TraceOptionsTest, TraceOptionsFromString) {
   TraceOptions options;
   EXPECT_TRUE(options.SetFromString("record-until-full"));
   EXPECT_EQ(RECORD_UNTIL_FULL, options.record_mode);
   EXPECT_FALSE(options.enable_sampling);
   EXPECT_FALSE(options.enable_systrace);
 
   EXPECT_TRUE(options.SetFromString("record-continuously"));
   EXPECT_EQ(RECORD_CONTINUOUSLY, options.record_mode);
   EXPECT_FALSE(options.enable_sampling);
@@ skipping 58 matching lines @@
         TraceOptions new_options;
         EXPECT_TRUE(new_options.SetFromString(original_option.ToString()));
         EXPECT_EQ(original_option.record_mode, new_options.record_mode);
         EXPECT_EQ(original_option.enable_sampling, new_options.enable_sampling);
         EXPECT_EQ(original_option.enable_systrace, new_options.enable_systrace);
       }
     }
   }
 }
 
-
 }  // namespace debug
 }  // namespace base