anchor.diff:        try {
           _handleMessage(event);
         } catch(e) {
  -        print("service error: $e ${e.stackTrace}");
  +        printError("Service error", e);
         }
       });
     }
  
positive.code:       sdk = DartSdk.createSdkFromContents(sdkContents);
        compiler = Compiler.createCompilerFrom(sdk);
        _readyCompleter.complete();
      }).catchError((error){
        // TODO(ericarnold): Return error which service will throw
        print("Chrome service error: $error ${error.stackTrace}");
      });
  
      return _readyCompleter.future;
  
negative.code:           completer.complete(event);
          }
        } catch(e) {
          printError("Service error", e);
        }
      });
      return completer.future;
  