Fix for file to URI mapping.

pkg/analysis_server/lib/src/domain_execution.dart

Index: pkg/analysis_server/lib/src/domain_execution.dart
diff --git a/pkg/analysis_server/lib/src/domain_execution.dart b/pkg/analysis_server/lib/src/domain_execution.dart
index 4c7714495c6f8ad1bfbc09c63afc078bf1c40175..d4c371ae73263723c841a16da803eb503f4505ae 100644
--- a/pkg/analysis_server/lib/src/domain_execution.dart
+++ b/pkg/analysis_server/lib/src/domain_execution.dart
@@ -105,7 +105,7 @@ class ExecutionDomainHandler implements RequestHandler {
             'file',
             'Either file or uri must be provided, but not both');
       }
-      Source source = server.getSource(path);
+      Source source = server.getSource(params.file);
       String uri = context.sourceFactory.restoreUri(source).toString();
       return new ExecutionMapUriResult(uri: uri).toResponse(request.id);
     } else if (params.uri != null) {