Connect heap map to instance view.

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

Index: runtime/bin/vmservice/client/lib/src/elements/heap_map.dart
===================================================================
--- runtime/bin/vmservice/client/lib/src/elements/heap_map.dart	(revision 35144)
+++ runtime/bin/vmservice/client/lib/src/elements/heap_map.dart	(working copy)
@@ -66,6 +66,7 @@
     super.enteredView();
     _fragmentationCanvas = shadowRoot.querySelector("#fragmentation");
     _fragmentationCanvas.onMouseMove.listen(_handleMouseMove);
+    _fragmentationCanvas.onMouseDown.listen(_handleClick);
   }
 
   // Encode color as single integer, to enable using it as a map key.
@@ -128,6 +129,11 @@
     var className = _classNameAt(event.offset);
     status = (className == '') ? '-' : '$className $addressString';
   }
+  
+  void _handleClick(MouseEvent event) {
+    var address = _addressAt(event.offset).toRadixString(16);
+    window.location.hash = "/${fragmentation.isolate.link}/address/$address";
+  }
 
   void _updateFragmentationData() {
     if (fragmentation == null || _fragmentationCanvas == null) {