respect show/hide combinators when generating suggestions

pkg/analysis_services/lib/src/completion/dart_completion_manager.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library test.services.completion.dart;
 
 import 'dart:async';
 
 import 'package:analysis_services/completion/completion_computer.dart';
 import 'package:analysis_services/completion/completion_suggestion.dart';
@@ skipping 27 matching lines @@
       computeFull();
     }
   }
 
   /**
    * Compute suggestions based upon cached information only
    * then send an initial response to the client.
    */
   void computeFast() {
     CompilationUnit unit = context.parseCompilationUnit(source);
-    computers.removeWhere((c) => c.computeFast(unit, suggestions));
+    AstNode node = new NodeLocator.con1(offset).searchWithin(unit);
+    computers.removeWhere((c) => c.computeFast(unit, node, suggestions));
     sendResults(computers.isEmpty);
   }
 
   /**
    * If there is remaining work to be done, then wait for the unit to be
    * resolved and request that each remaining computer finish their work.
    */
   void computeFull() {
     waitForAnalysis().then((CompilationUnit unit) {
       if (unit == null) {
         sendResults(true);
         return;
       }
+      AstNode node = new NodeLocator.con1(offset).searchWithin(unit);
       int count = computers.length;
       computers.forEach((c) {
-        c.computeFull(unit, suggestions).then((bool changed) {
+        c.computeFull(unit, node, suggestions).then((bool changed) {
           var last = --count == 0;
           if (changed || last) {
             sendResults(last);
           }
         });
       });
     });
   }
 
   /**
@@ skipping 30 matching lines @@
     if (library != null) {
       var unit = context.getResolvedCompilationUnit(source, library);
       if (unit != null) {
         return new Future.value(unit);
       }
     }
     //TODO (danrubel) Determine if analysis is complete but unit not resolved
     return new Future(waitForAnalysis);
   }
 }