Use tokenPos instead of line/col in the vm service.

runtime/bin/vmservice/client/lib/src/elements/script_ref.dart

Index: runtime/bin/vmservice/client/lib/src/elements/script_ref.dart
diff --git a/runtime/bin/vmservice/client/lib/src/elements/script_ref.dart b/runtime/bin/vmservice/client/lib/src/elements/script_ref.dart
index 1eaf1b46c338e96d11171663404126fcd568fd2b..c88d43a7045e5ec6d48884bcc65d7ef15a815a99 100644
--- a/runtime/bin/vmservice/client/lib/src/elements/script_ref.dart
+++ b/runtime/bin/vmservice/client/lib/src/elements/script_ref.dart
@@ -5,20 +5,28 @@
 library script_ref_element;
 
 import 'package:polymer/polymer.dart';
+import 'package:observatory/service.dart';
 import 'service_ref.dart';
 
 @CustomTag('script-ref')
 class ScriptRefElement extends ServiceRefElement {
-  @published int line = -1;
+  @published int pos = -1;
 
   String get hoverText {
     if (ref == null) {
       return super.hoverText;
     }
-    if (line < 0) {
-      return ref.vmName;
-    } else {
-      return '${ref.vmName}:$line';
+    return ref.vmName;
+  }
+
+  void posChanged(oldValue) {
+    _updateProperties(null);
+  }
+
+  void _updateProperties(_) {
+    if (ref != null && ref.loaded) {
+      notifyPropertyChange(#name, 0, 1);
+      notifyPropertyChange(#url, 0, 1);
     }
   }
 
@@ -26,11 +34,32 @@ class ScriptRefElement extends ServiceRefElement {
     if (ref == null) {
       return super.name;
     }
-    if (line < 0) {
-      return ref.name;
-    } else {
-      return '${ref.name}:$line';
+    if (pos >= 0) {
+      if (ref.loaded) {
+        // Script is loaded, get the line number.
+        Script script = ref;
+        return '${super.name}:${script.tokenToLine(pos)}';
+      } else {
+        ref.load().then(_updateProperties);
+      }
+    }
+    return super.name;
+  }
+
+  String get url {
+    if (ref == null) {
+      return super.url;
+    }
+    if (pos >= 0) {
+      if (ref.loaded) {
+        // Script is loaded, get the line number.
+        Script script = ref;
+        return '${super.url}#line=${script.tokenToLine(pos)}';
+      } else {
+        ref.load().then(_updateProperties);
+      }
     }
+    return super.url;
   }
 
   ScriptRefElement.created() : super.created();