Library dependencies server API updates (to pass package maps).

pkg/analysis_server/lib/src/services/dependencies/library_dependencies.dart

Index: pkg/analysis_server/lib/src/services/dependencies/library_dependencies.dart
===================================================================
--- pkg/analysis_server/lib/src/services/dependencies/library_dependencies.dart	(revision 43141)
+++ pkg/analysis_server/lib/src/services/dependencies/library_dependencies.dart	(working copy)
@@ -4,9 +4,11 @@
 
 library services.dependencies.library;
 
+import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/source.dart';
+import 'package:analyzer/src/generated/source_io.dart';
 
 class LibraryDependencyCollector {
 
@@ -17,6 +19,18 @@
 
   LibraryDependencyCollector(this._contexts);
 
+  Map<String, String> calculatePackageMap() {
+    Map<String, String> map = new Map<String, String>();
+    for (AnalysisContext context in _contexts) {
+      Map<String, Folder> packageMap = context.sourceFactory.packageMap;
+      if (packageMap != null) {
+        packageMap.forEach(
+            (String name, Folder folder) => map.putIfAbsent(name, () => folder.path));
+      }
+    }
+    return map;
+  }
+
   Set<String> collectLibraryDependencies() {
     _contexts.forEach(
         (AnalysisContext context) =>