Add TRACE_COUNTER_WITH_TIMESTAMPx macros.

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 95ea215939fe48a7617aa7bb93ad1e490f9b401d..14448e215b70817bc8ec15e3a2636be7d723e493 100644
--- a/base/trace_event/trace_event.h
+++ b/base/trace_event/trace_event.h
@@ -302,6 +302,23 @@ TRACE_EVENT_API_CLASS_EXPORT extern \
 
 // Implementation detail: internal macro to create static category and add
 // event if the category is enabled.
+#define INTERNAL_TRACE_EVENT_ADD_WITH_TIMESTAMP(phase, category_group, name, \
+                                                timestamp, flags, ...)       \
+  do {                                                                       \
+    INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO(category_group);                  \
+    if (INTERNAL_TRACE_EVENT_CATEGORY_GROUP_ENABLED_FOR_RECORDING_MODE()) {  \
+      trace_event_internal::AddTraceEventWithThreadIdAndTimestamp(           \
+          phase, INTERNAL_TRACE_EVENT_UID(category_group_enabled), name,     \
+          trace_event_internal::kNoId, trace_event_internal::kNoId,          \
+          TRACE_EVENT_API_CURRENT_THREAD_ID,                                 \
+          base::TimeTicks::FromInternalValue(timestamp),                     \
+          flags | TRACE_EVENT_FLAG_EXPLICIT_TIMESTAMP,                       \
+          trace_event_internal::kNoId, ##__VA_ARGS__);                       \
+    }                                                                        \
+  } while (0)
+
+// Implementation detail: internal macro to create static category and add
+// event if the category is enabled.
 #define INTERNAL_TRACE_EVENT_ADD_WITH_ID_TID_AND_TIMESTAMP(phase, \
         category_group, name, id, thread_id, timestamp, flags, ...) \
     do { \