Configure synthetic delays through TraceLog

base/debug/trace_event_unittest.cc

Index: base/debug/trace_event_unittest.cc
diff --git a/base/debug/trace_event_unittest.cc b/base/debug/trace_event_unittest.cc
index aef2c43b6faad81700299647b0e79d075465ad9a..96bf3e59f5d0e67c67b0295f1c5a0d6c11d39492 100644
--- a/base/debug/trace_event_unittest.cc
+++ b/base/debug/trace_event_unittest.cc
@@ -9,6 +9,7 @@
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
+#include "base/debug/trace_event_synthetic_delay.h"
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
 #include "base/memory/ref_counted_memory.h"
@@ -2582,5 +2583,18 @@ TEST_F(TraceEventTestFixture, TimeOffset) {
   }
 }
 
+TEST_F(TraceEventTestFixture, ConfigureSyntheticDelays) {
+  BeginSpecificTrace("test.Delay=0.05");
+
+  base::TimeTicks start = base::TimeTicks::Now();
+  {
+    TRACE_EVENT_SYNTHETIC_DELAY("test.Delay");
+  }
+  base::TimeDelta duration = base::TimeTicks::Now() - start;
+  EXPECT_GE(duration.InMilliseconds(), 50);
+
+  EndTraceAndFlush();
+}
+
 }  // namespace debug
 }  // namespace base