Avoid to updated selection on links click in cpu-profile-table

runtime/observatory/lib/src/elements/cpu_profile_table.dart

Index: runtime/observatory/lib/src/elements/cpu_profile_table.dart
diff --git a/runtime/observatory/lib/src/elements/cpu_profile_table.dart b/runtime/observatory/lib/src/elements/cpu_profile_table.dart
index 552de27d40115a60a742ea6ce991949f0df7d25e..d7b09d7d0ad2929ad379a201e1d7098ee5d9f8d9 100644
--- a/runtime/observatory/lib/src/elements/cpu_profile_table.dart
+++ b/runtime/observatory/lib/src/elements/cpu_profile_table.dart
@@ -223,7 +223,10 @@ class CpuProfileTableElement  extends HtmlElement implements Renderable {
           ..text = '0%',
         new SpanElement()..classes = const ['name']
       ];
-    element.onClick.listen((_) {
+    element.onClick.listen((e) {
+      if (e.target is AnchorElement) {
+        return;
+      }
       _selected = _functions.getItemFromElement(element);
       _r.dirty();
     });
@@ -287,7 +290,10 @@ class CpuProfileTableElement  extends HtmlElement implements Renderable {
           ..text = '0%',
         new SpanElement()..classes = const ['name']
       ];
-    element.onClick.listen((_) {
+    element.onClick.listen((e) {
+      if (e.target is AnchorElement) {
+        return;
+      }
       _selected = _callees.getItemFromElement(element);
       _r.dirty();
     });
@@ -322,7 +328,10 @@ class CpuProfileTableElement  extends HtmlElement implements Renderable {
           ..text = '0%',
         new SpanElement()..classes = const ['name']
       ];
-    element.onClick.listen((_) {
+    element.onClick.listen((e) {
+      if (e.target is AnchorElement) {
+        return;
+      }
       _selected = _callers.getItemFromElement(element);
       _r.dirty();
     });