Add DeadlineOverrun step to the RendererSchedulerIdlePeriod trace event.

base/trace_event/trace_event.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This header file defines the set of trace_event macros without specifying
 // how the events actually get collected and stored. If you need to expose trace
 // events to some other universe, you can copy-and-paste this file as well as
 // trace_event.h, modifying the macros contained there as necessary for the
 // target platform. The end result is that multiple libraries can funnel events
 // through to a shared trace event collector.
@@ skipping 578 matching lines @@
 // ASYNC_STEP_PAST events.
 #define TRACE_EVENT_ASYNC_STEP_INTO0(category_group, name, id, step) \
     INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_STEP_INTO, \
         category_group, name, id, TRACE_EVENT_FLAG_NONE, "step", step)
 #define TRACE_EVENT_ASYNC_STEP_INTO1(category_group, name, id, step, \
                                      arg1_name, arg1_val) \
     INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_STEP_INTO, \
         category_group, name, id, TRACE_EVENT_FLAG_NONE, "step", step, \
         arg1_name, arg1_val)
 
+// Similar to TRACE_EVENT_ASYNC_STEP_INTOx but with a custom |at| timestamp
+// provided.
+#define TRACE_EVENT_ASYNC_STEP_INTO_WITH_TIMESTAMP0(category_group, name, \
+        id, step, timestamp) \
+    INTERNAL_TRACE_EVENT_ADD_WITH_ID_TID_AND_TIMESTAMP( \
+        TRACE_EVENT_PHASE_ASYNC_STEP_INTO, category_group, name, id, \
+        static_cast<int>(base::PlatformThread::CurrentId()), \
+        timestamp, TRACE_EVENT_FLAG_NONE, "step", step)
+
 // Records a single ASYNC_STEP_PAST event for |step| immediately. If the
 // category is not enabled, then this does nothing. The |name| and |id| must
 // match the ASYNC_BEGIN event above. The |step| param identifies this step
 // within the async event. This should be called at the beginning of the next
 // phase of an asynchronous operation. The ASYNC_BEGIN event must not have any
 // ASYNC_STEP_INTO events.
 #define TRACE_EVENT_ASYNC_STEP_PAST0(category_group, name, id, step) \
     INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_STEP_PAST, \
         category_group, name, id, TRACE_EVENT_FLAG_NONE, "step", step)
 #define TRACE_EVENT_ASYNC_STEP_PAST1(category_group, name, id, step, \
@@ skipping 979 matching lines @@
   const char* name_;
   IDType id_;
 
   DISALLOW_COPY_AND_ASSIGN(TraceScopedTrackableObject);
 };
 
 }  // namespace trace_event
 }  // namespace base
 
 #endif /* BASE_TRACE_EVENT_TRACE_EVENT_H_ */