Refactor 'dart:profiler' UserTag API

runtime/vm/intrinsifier.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 // Class for intrinsifying functions.
 
 #ifndef VM_INTRINSIFIER_H_
 #define VM_INTRINSIFIER_H_
 
 #include "vm/allocation.h"
 
@@ skipping 118 matching lines @@
   V(_Uint64Array, ., TypedData_Uint64Array_factory, 767338823)                 \
   V(_Float32Array, ., TypedData_Float32Array_factory, 1721244151)              \
   V(_Float64Array, ., TypedData_Float64Array_factory, 1599078532)              \
   V(_Float32x4Array, ., TypedData_Float32x4Array_factory, 879975401)           \
   V(_Int32x4Array, ., TypedData_Int32x4Array_factory, 924582681)               \
   V(_Float64x2Array, ., TypedData_Float64x2Array_factory, 1654170890)          \
 
 
 #define PROFILER_LIB_INTRINSIC_LIST(V)                                         \
   V(_UserTag, makeCurrent, UserTag_makeCurrent, 1038211262)                    \
+  V(::, _getDefaultTag, UserTag_defaultTag, 624228668)                         \
   V(::, _getCurrentTag, Profiler_getCurrentTag, 1559793589)                    \
-  V(::, _clearCurrentTag, Profiler_clearCurrentTag, 874694572)                 \
 
 // TODO(srdjan): Implement _FixedSizeArrayIterator, get:current and
 //   _FixedSizeArrayIterator, moveNext.
 
 // Forward declarations.
 class Assembler;
 class Function;
 
 class Intrinsifier : public AllStatic {
  public:
@@ skipping 13 matching lines @@
   MATH_LIB_INTRINSIC_LIST(DECLARE_FUNCTION)
   TYPED_DATA_LIB_INTRINSIC_LIST(DECLARE_FUNCTION)
   PROFILER_LIB_INTRINSIC_LIST(DECLARE_FUNCTION)
 
 #undef DECLARE_FUNCTION
 };
 
 }  // namespace dart
 
 #endif  // VM_INTRINSIFIER_H_