[scheduler]: Avoid waking up the scheduler to end long idle periods.

base/trace_event/trace_event.h

Index: base/trace_event/trace_event.h
diff --git a/base/trace_event/trace_event.h b/base/trace_event/trace_event.h
index 2c30b3340a2dd06edf8fcd8290ef96eee0412b16..5e134904eafc36262593198cb157b8a419e9b740 100644
--- a/base/trace_event/trace_event.h
+++ b/base/trace_event/trace_event.h
@@ -760,6 +760,20 @@
         TRACE_EVENT_FLAG_ASYNC_TTS | TRACE_EVENT_FLAG_COPY, \
         arg1_name, arg1_val, arg2_name, arg2_val)
 
+#define TRACE_EVENT_NESTABLE_ASYNC_BEGIN_WITH_TIMESTAMP0(category_group, name, \
+                                                         id, timestamp)        \

[Sami, 2015/05/27 12:11:56]

Was this git cl format? I wonder if we should be following the existing style
here instead.

[rmcilroy, 2015/05/27 19:17:05]

Yeah this was git cl format. Went back to old formatting, but we should probably
reformat this whole file with git cl format at some point to avoid this in the
future.

+  INTERNAL_TRACE_EVENT_ADD_WITH_ID_TID_AND_TIMESTAMP(                          \
+      TRACE_EVENT_PHASE_NESTABLE_ASYNC_BEGIN, category_group, name, id,        \
+      static_cast<int>(base::PlatformThread::CurrentId()), timestamp,          \
+      TRACE_EVENT_FLAG_NONE)
+
+#define TRACE_EVENT_NESTABLE_ASYNC_END_WITH_TIMESTAMP0(category_group, name, \
+                                                       id, timestamp)        \
+  INTERNAL_TRACE_EVENT_ADD_WITH_ID_TID_AND_TIMESTAMP(                        \
+      TRACE_EVENT_PHASE_NESTABLE_ASYNC_END, category_group, name, id,        \
+      static_cast<int>(base::PlatformThread::CurrentId()), timestamp,        \
+      TRACE_EVENT_FLAG_NONE)
+
 // Records a single NESTABLE_ASYNC_INSTANT event called "name" immediately,
 // with 2 associated arguments. If the category is not enabled, then this
 // does nothing.