content: Add heartbeat trace for CategorizedWorkerPool.

base/synchronization/condition_variable_win.cc

Index: base/synchronization/condition_variable_win.cc
diff --git a/base/synchronization/condition_variable_win.cc b/base/synchronization/condition_variable_win.cc
index 61c6a715e0eccd8557338193f7f8313ab431b9ce..672dbec22fb82be120a840259a5b95ed7c761a3f 100644
--- a/base/synchronization/condition_variable_win.cc
+++ b/base/synchronization/condition_variable_win.cc
@@ -26,7 +26,7 @@ void ConditionVariable::Wait() {
   TimedWait(TimeDelta::FromMilliseconds(INFINITE));
 }
 
-void ConditionVariable::TimedWait(const TimeDelta& max_time) {
+bool ConditionVariable::TimedWait(const TimeDelta& max_time) {
   base::ThreadRestrictions::AssertWaitAllowed();
   DWORD timeout = static_cast<DWORD>(max_time.InMilliseconds());
 
@@ -34,13 +34,17 @@ void ConditionVariable::TimedWait(const TimeDelta& max_time) {
   user_lock_->CheckHeldAndUnmark();
 #endif
 
+  bool timed_out = false;
   if (FALSE == SleepConditionVariableSRW(&cv_, srwlock_, timeout, 0)) {
-    DCHECK(GetLastError() != WAIT_TIMEOUT);
+    timed_out = GetLastError() == ERROR_TIMEOUT;
+    DCHECK(timed_out);
   }
 
 #if DCHECK_IS_ON()
   user_lock_->CheckUnheldAndMark();
 #endif
+
+  return timed_out;
 }
 
 void ConditionVariable::Broadcast() {