Add crash dumps to service protocol and Observatory

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

Index: runtime/observatory/lib/src/elements/debugger.dart
diff --git a/runtime/observatory/lib/src/elements/debugger.dart b/runtime/observatory/lib/src/elements/debugger.dart
index 965ea1cc966970bfb2903568423cc6206b322e3a..2098d9355d4fb92da2afbebb0dab2b5c3fe85bde 100644
--- a/runtime/observatory/lib/src/elements/debugger.dart
+++ b/runtime/observatory/lib/src/elements/debugger.dart
@@ -883,6 +883,11 @@ class ObservatoryDebugger extends Debugger {
           _refreshStack(isolate.pauseEvent).then((_) {
             reportStatus();
           });
+        }).catchError((_) {
+          // Error loading libraries, try and display stack.

[turnidge, 2015/04/23 17:03:33]

I kinda think we should include the libs in the crash dump... your call though. 
Fine for now.

[Cutch, 2015/04/24 00:05:32]

Acknowledged.

+          _refreshStack(isolate.pauseEvent).then((_) {
+            reportStatus();
+          });
         });
       });
     } else {