Adds missing and removes duplicate tracing macros.

src/core/SkTraceEventCommon.h

Index: src/core/SkTraceEventCommon.h
diff --git a/src/core/SkTraceEventCommon.h b/src/core/SkTraceEventCommon.h
index aa5a4935362686ede2f1c1935fb9448fbb7663a9..57f67775e8057e65b0acd3c03004d6e8f9a6c58f 100644
--- a/src/core/SkTraceEventCommon.h
+++ b/src/core/SkTraceEventCommon.h
@@ -745,16 +745,17 @@
       TRACE_EVENT_FLAG_NONE, arg1_name, arg1_val, arg2_name, arg2_val)
 
 // Records a single NESTABLE_ASYNC_INSTANT event called "name" immediately,
-// with one associated argument. If the category is not enabled, then this
-// does nothing.
+// with none, one or two associated argument. If the category is not enabled,
+// then this does nothing.
+#define TRACE_EVENT_NESTABLE_ASYNC_INSTANT0(category_group, name, id)        \
+  INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_NESTABLE_ASYNC_INSTANT, \
+                                   category_group, name, id,                 \
+                                   TRACE_EVENT_FLAG_NONE)
 #define TRACE_EVENT_NESTABLE_ASYNC_INSTANT1(category_group, name, id,        \
                                             arg1_name, arg1_val)             \
   INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_NESTABLE_ASYNC_INSTANT, \
                                    category_group, name, id,                 \
                                    TRACE_EVENT_FLAG_NONE, arg1_name, arg1_val)
-// Records a single NESTABLE_ASYNC_INSTANT event called "name" immediately,
-// with 2 associated arguments. If the category is not enabled, then this
-// does nothing.
 #define TRACE_EVENT_NESTABLE_ASYNC_INSTANT2(                              \
     category_group, name, id, arg1_name, arg1_val, arg2_name, arg2_val)   \
   INTERNAL_TRACE_EVENT_ADD_WITH_ID(                                       \