TaskScheduler: Add TRACE_TASK_EXECUTION to TaskTracker::RunTask.

base/task_scheduler/task_tracker.cc

Index: base/task_scheduler/task_tracker.cc
diff --git a/base/task_scheduler/task_tracker.cc b/base/task_scheduler/task_tracker.cc
index f38ec06130e6bebfd77d469478a34dea93b34951..985c35385903e99d99253eee2306fd577dd4ff99 100644
--- a/base/task_scheduler/task_tracker.cc
+++ b/base/task_scheduler/task_tracker.cc
@@ -10,6 +10,7 @@
 #include "base/thread_task_runner_handle.h"
 #include "base/threading/sequenced_task_runner_handle.h"
 #include "base/threading/thread_restrictions.h"
+#include "base/trace_event/trace_event.h"
 
 namespace base {
 namespace internal {
@@ -17,6 +18,7 @@ namespace internal {
 namespace {
 
 const char kQueueFunctionName[] = "base::PostTask";
+const char kRunFunctionName[] = "TaskSchedulerRunTask";

[robliao, 2016/05/03 16:46:51]

Comment where this name originated.

[fdoray, 2016/05/03 17:07:14]

Done.

 
 // Upper bound for the
 // TaskScheduler.BlockShutdownTasksPostedDuringShutdown histogram.
@@ -102,6 +104,8 @@ void TaskTracker::RunTask(const Task* task) {
           new ThreadTaskRunnerHandle(task->single_thread_task_runner_ref));
     }
 
+    TRACE_TASK_EXECUTION(kRunFunctionName, *task);
+
     debug::TaskAnnotator task_annotator;
     task_annotator.RunTask(kQueueFunctionName, *task);
   }