Adding flow traces for blink scheduler events

Source/platform/scheduler/Scheduler.h

Index: Source/platform/scheduler/Scheduler.h
diff --git a/Source/platform/scheduler/Scheduler.h b/Source/platform/scheduler/Scheduler.h
index 9524ec37a34d76596985ea4f2c438e84bb52dbef..717ca1a24cc6edde86df49f552674b573e5b9cfc 100644
--- a/Source/platform/scheduler/Scheduler.h
+++ b/Source/platform/scheduler/Scheduler.h
@@ -6,7 +6,7 @@
 #define Scheduler_h
 
 #include "platform/PlatformExport.h"
-#include "platform/TraceLocation.h"
+#include "platform/scheduler/TracedTask.h"
 #include "wtf/DoubleBufferedDeque.h"
 #include "wtf/Functional.h"
 #include "wtf/Noncopyable.h"
@@ -60,23 +60,11 @@ private:
     friend class MainThreadPendingTaskRunner;
     friend class MainThreadPendingHighPriorityTaskRunner;
 
-    class TracedTask {
-    public:
-        TracedTask(const Task& task, const TraceLocation& location)
-            : m_task(task)
-            , m_location(location) { }
-
-        void run();
-
-    private:
-        Task m_task;
-        TraceLocation m_location;
-    };
-
     Scheduler();
     ~Scheduler();
 
     void scheduleIdleTask(const TraceLocation&, const IdleTask&);
+    void postHighPriorityTaskInternal(const TraceLocation&, const Task&, const char* traceName);
 
     static void sharedTimerAdapter();
     void tickSharedTimer();
@@ -103,7 +91,9 @@ private:
     Mutex m_pendingTasksMutex;
     DoubleBufferedDeque<TracedTask> m_pendingHighPriorityTasks;
 
+    // Declared volatile as they are atomically incremented.

[Sami, 2014/09/04 09:51:07]

nit: s/they are/this is/.

[picksi1, 2014/09/05 08:28:33]

Done.

     volatile int m_highPriorityTaskCount;
+
     bool m_highPriorityTaskRunnerPosted;
 };