Refactor 'dart:profiler' UserTag API

runtime/vm/isolate.cc

 // Copyright (c) 2013, 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.
 
 #include "vm/isolate.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/json.h"
 #include "lib/mirrors.h"
@@ skipping 325 matching lines @@
       object_id_ring_(NULL),
       profiler_data_(NULL),
       thread_state_(NULL),
       tag_table_(GrowableObjectArray::null()),
       current_tag_(UserTag::null()),
       next_(NULL),
       REUSABLE_HANDLE_LIST(REUSABLE_HANDLE_INITIALIZERS)
       REUSABLE_HANDLE_LIST(REUSABLE_HANDLE_SCOPE_INIT)
       reusable_handles_() {
   set_vm_tag(VMTag::kIdleTagId);
-  set_user_tag(UserTags::kNoUserTag);
+  set_user_tag(UserTags::kDefaultUserTag);
 }
 #undef REUSABLE_HANDLE_SCOPE_INIT
 #undef REUSABLE_HANDLE_INITIALIZERS
 
 
 Isolate::~Isolate() {
   delete [] name_;
   delete heap_;
   delete object_store_;
   delete api_state_;
@@ skipping 649 matching lines @@
 }
 
 
 void Isolate::set_current_tag(const UserTag& tag) {
   intptr_t user_tag = tag.tag();
   set_user_tag(static_cast<uword>(user_tag));
   current_tag_ = tag.raw();
 }
 
 
-void Isolate::clear_current_tag() {
-  set_user_tag(UserTags::kNoUserTag);
-  current_tag_ = UserTag::null();
-}
-
-
 void Isolate::VisitIsolates(IsolateVisitor* visitor) {
   if (visitor == NULL) {
     return;
   }
   MonitorLocker ml(isolates_list_monitor_);
   Isolate* current = isolates_list_head_;
   while (current) {
     visitor->VisitIsolate(current);
     current = current->next_;
   }
@@ skipping 149 matching lines @@
   return func.raw();
 }
 
 
 void IsolateSpawnState::Cleanup() {
   SwitchIsolateScope switch_scope(isolate());
   Dart::ShutdownIsolate();
 }
 
 }  // namespace dart