Use VM tag in profile and add stack trace trie

runtime/bin/vmservice/client/lib/src/service/cache.dart

Index: runtime/bin/vmservice/client/lib/src/service/cache.dart
diff --git a/runtime/bin/vmservice/client/lib/src/service/cache.dart b/runtime/bin/vmservice/client/lib/src/service/cache.dart
index 6feb94a2b468b4b8c46d1651c2c3d212158ce459..eb3b48dcf6eacd34a2f00c5d4b029c2808cb8f94 100644
--- a/runtime/bin/vmservice/client/lib/src/service/cache.dart
+++ b/runtime/bin/vmservice/client/lib/src/service/cache.dart
@@ -113,6 +113,10 @@ class CodeCache extends ServiceObjectCache<Code> {
     return codeList;
   }
 
+  Code tagRoot() {
+    return _cache['code/tag-0'];

[turnidge, 2014/03/17 21:19:31]

Seems kinda magic.

[Cutch, 2014/03/18 14:39:19]

Done.

+  }
+
   void _resetProfileData() {
     _cache.forEach((k, Code code) {
       code.resetProfileData();
@@ -154,6 +158,7 @@ class FunctionCache extends ServiceObjectCache<ServiceMap> {
                  r'^functions/collected-.+|'
                  r'^functions/reused-.+|'
                  r'^functions/stub-.+|'
+                 r'^functions/tag-.+|'
                  r'^classes/\d+/functions/.+|'
                  r'^classes/\d+/closures/.+|'
                  r'^classes/\d+/implicit_closures/.+|'