Trace memory records source function for posted tasks instead of "RunTask"

base/debug/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 215 matching lines @@
     INTERNAL_TRACE_EVENT_ADD_SCOPED(category_group, name)
 #define TRACE_EVENT1(category_group, name, arg1_name, arg1_val) \
     INTERNAL_TRACE_MEMORY(category_group, name) \
     INTERNAL_TRACE_EVENT_ADD_SCOPED(category_group, name, arg1_name, arg1_val)
 #define TRACE_EVENT2( \
     category_group, name, arg1_name, arg1_val, arg2_name, arg2_val) \
   INTERNAL_TRACE_MEMORY(category_group, name) \
   INTERNAL_TRACE_EVENT_ADD_SCOPED( \
       category_group, name, arg1_name, arg1_val, arg2_name, arg2_val)
 
+// Records events like TRACE_EVENT2 but uses |memory_tag| for memory tracing.
+// Use this where |name| is too generic to accurately aggregate allocations.
+#define TRACE_EVENT_WITH_MEMORY_TAG2( \
+    category, name, memory_tag, arg1_name, arg1_val, arg2_name, arg2_val) \
+  INTERNAL_TRACE_MEMORY(category, memory_tag) \
+  INTERNAL_TRACE_EVENT_ADD_SCOPED( \
+      category, name, arg1_name, arg1_val, arg2_name, arg2_val)
+
 // UNSHIPPED_TRACE_EVENT* are like TRACE_EVENT* except that they are not
 // included in official builds.
 
 #if OFFICIAL_BUILD
 #undef TRACING_IS_OFFICIAL_BUILD
 #define TRACING_IS_OFFICIAL_BUILD 1
 #elif !defined(TRACING_IS_OFFICIAL_BUILD)
 #define TRACING_IS_OFFICIAL_BUILD 0
 #endif
 
@@ skipping 1287 matching lines @@
   const char* name_;
   IDType id_;
 
   DISALLOW_COPY_AND_ASSIGN(TraceScopedTrackableObject);
 };
 
 } // namespace debug
 } // namespace base
 
 #endif /* BASE_DEBUG_TRACE_EVENT_H_ */