Draw the start of input latency using its original/ui timestamp

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 542 matching lines @@
         arg1_val) \
     INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_BEGIN, \
         category_group, name, id, TRACE_EVENT_FLAG_COPY, \
         arg1_name, arg1_val)
 #define TRACE_EVENT_COPY_ASYNC_BEGIN2(category_group, name, id, arg1_name, \
         arg1_val, arg2_name, arg2_val) \
     INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_BEGIN, \
         category_group, name, id, TRACE_EVENT_FLAG_COPY, \
         arg1_name, arg1_val, arg2_name, arg2_val)
 
+// Similar to TRACE_EVENT_ASYNC_BEGINx but with a custom |at| timestamp
+// provided.
+#define TRACE_EVENT_ASYNC_BEGIN_WITH_TIMESTAMP0(category_group, \
+        name, id, timestamp) \
+    INTERNAL_TRACE_EVENT_ADD_WITH_ID_TID_AND_TIMESTAMP( \
+        TRACE_EVENT_PHASE_ASYNC_BEGIN, category_group, name, id, \
+        static_cast<int>(base::PlatformThread::CurrentId()), \
+        timestamp, TRACE_EVENT_FLAG_NONE)
+
 // Records a single ASYNC_STEP_INTO 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_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, \
@@ skipping 37 matching lines @@
         arg1_val) \
     INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_END, \
         category_group, name, id, TRACE_EVENT_FLAG_COPY, \
         arg1_name, arg1_val)
 #define TRACE_EVENT_COPY_ASYNC_END2(category_group, name, id, arg1_name, \
         arg1_val, arg2_name, arg2_val) \
     INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_END, \
         category_group, name, id, TRACE_EVENT_FLAG_COPY, \
         arg1_name, arg1_val, arg2_name, arg2_val)
 
+// Similar to TRACE_EVENT_ASYNC_ENDx but with a custom |at| timestamp provided.
+#define TRACE_EVENT_ASYNC_END_WITH_TIMESTAMP0(category_group, \
+        name, id, timestamp) \
+    INTERNAL_TRACE_EVENT_ADD_WITH_ID_TID_AND_TIMESTAMP( \
+        TRACE_EVENT_PHASE_ASYNC_END, category_group, name, id, \
+        static_cast<int>(base::PlatformThread::CurrentId()), \
+        timestamp, TRACE_EVENT_FLAG_NONE)
 
 // Records a single FLOW_BEGIN event called "name" immediately, with 0, 1 or 2
 // associated arguments. If the category is not enabled, then this
 // does nothing.
 // - category and name strings must have application lifetime (statics or
 //   literals). They may not include " chars.
 // - |id| is used to match the FLOW_BEGIN event with the FLOW_END event. FLOW
 //   events are considered to match if their category_group, name and id values
 //   all match. |id| must either be a pointer or an integer value up to 64 bits.
 //   If it's a pointer, the bits will be xored with a hash of the process ID so
@@ skipping 880 matching lines @@
   const char* name_;
   IDType id_;
 
   DISALLOW_COPY_AND_ASSIGN(TraceScopedTrackableObject);
 };
 
 } // namespace debug
 } // namespace base
 
 #endif /* BASE_DEBUG_TRACE_EVENT_H_ */