content: Add heartbeat trace for CategorizedWorkerPool.

base/synchronization/condition_variable_unittest.cc

Index: base/synchronization/condition_variable_unittest.cc
diff --git a/base/synchronization/condition_variable_unittest.cc b/base/synchronization/condition_variable_unittest.cc
index d60b2b8af58aa55c48886933c7682fb452d9f963..adb1c9e67e78b0273ab9fc2a677c4a8353b79608 100644
--- a/base/synchronization/condition_variable_unittest.cc
+++ b/base/synchronization/condition_variable_unittest.cc
@@ -194,6 +194,28 @@ TEST_F(ConditionVariableTest, TimeoutTest) {
   lock.Release();
 }
 
+void SignalConditionVariable(ConditionVariable* cv) {
+  cv->Signal();
+}
+
+TEST_F(ConditionVariableTest, TimedWaitTimeoutTest) {
+  Lock lock;
+  ConditionVariable cv(&lock);
+  lock.Acquire();
+
+  bool timed_out = cv.TimedWait(TimeDelta::FromMilliseconds(50));
+  EXPECT_TRUE(timed_out);
+
+  Thread thread("Helper");
+  thread.Start();
+  thread.task_runner()->PostTask(FROM_HERE,
+                                 base::Bind(&SignalConditionVariable, &cv));
+  timed_out = cv.TimedWait(TimeDelta::FromMilliseconds(300));
+  EXPECT_FALSE(timed_out);
+
+  lock.Release();
+}
+
 #if defined(OS_POSIX)
 const int kDiscontinuitySeconds = 2;