Adding raw tracing to trace framework.

base/debug/trace_event.h

Index: base/debug/trace_event.h
diff --git a/base/debug/trace_event.h b/base/debug/trace_event.h
index d17328214e494283d1c6bf38d9d3393ed432faa6..3459a94800bca490801498515ed17b66407c1f92 100644
--- a/base/debug/trace_event.h
+++ b/base/debug/trace_event.h
@@ -44,6 +44,22 @@
 #define TRACE_EVENT_API_ADD_TRACE_EVENT \
     base::debug::TraceLog::GetInstance()->AddTraceEvent
 
+// Add a trace event to the platform tracing system.
+// void TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_TIMESTAMP(
+//                    char phase,
+//                    const unsigned char* category_enabled,
+//                    const char* name,
+//                    unsigned long long id,
+//                    int thread_id,
+//                    const TimeTicks& timestamp,
+//                    int num_args,
+//                    const char** arg_names,
+//                    const unsigned char* arg_types,
+//                    const unsigned long long* arg_values,
+//                    unsigned char flags)
+#define TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_THREAD_ID_AND_TIMESTAMP \
+    base::debug::TraceLog::GetInstance()->AddTraceEventWithThreadIdAndTimestamp
+
 // Defines atomic operations used internally by the tracing system.
 #define TRACE_EVENT_API_ATOMIC_WORD base::subtle::AtomicWord
 #define TRACE_EVENT_API_ATOMIC_LOAD(var) base::subtle::NoBarrier_Load(&(var))