Revert "Use single InputPackagesResultProvider, without SdkSummaryResultProvider."

pkg/analyzer/lib/src/summary/resynthesize.dart

Index: pkg/analyzer/lib/src/summary/resynthesize.dart
diff --git a/pkg/analyzer/lib/src/summary/resynthesize.dart b/pkg/analyzer/lib/src/summary/resynthesize.dart
index f60514c7574e3a6cb13dd5555ee9be0b139c903b..c4f6caa80ac4ce5a58d4058c88f9e58119a9366c 100644
--- a/pkg/analyzer/lib/src/summary/resynthesize.dart
+++ b/pkg/analyzer/lib/src/summary/resynthesize.dart
@@ -22,7 +22,6 @@ import 'package:analyzer/src/generated/testing/ast_test_factory.dart';
 import 'package:analyzer/src/generated/testing/token_factory.dart';
 import 'package:analyzer/src/summary/format.dart';
 import 'package:analyzer/src/summary/idl.dart';
-import 'package:analyzer/src/summary/summary_sdk.dart';
 
 /**
  * Implementation of [ElementResynthesizer] used when resynthesizing an element
@@ -30,6 +29,13 @@ import 'package:analyzer/src/summary/summary_sdk.dart';
  */
 abstract class SummaryResynthesizer extends ElementResynthesizer {
   /**
+   * The parent [SummaryResynthesizer] which is asked to resynthesize elements
+   * and get summaries before this resynthesizer attempts to do this.
+   * Can be `null`.
+   */
+  final SummaryResynthesizer parent;
+
+  /**
    * Source factory used to convert URIs to [Source] objects.
    */
   final SourceFactory sourceFactory;
@@ -40,9 +46,10 @@ abstract class SummaryResynthesizer extends ElementResynthesizer {
   final Map<String, Source> _sources = <String, Source>{};
 
   /**
-   * The [TypeProvider] used to obtain SDK types during resynthesis.
+   * The [TypeProvider] used to obtain core types (such as Object, int, List,
+   * and dynamic) during resynthesis.
    */
-  TypeProvider _typeProvider;
+  final TypeProvider typeProvider;
 
   /**
    * Indicates whether the summary should be resynthesized assuming strong mode
@@ -73,11 +80,9 @@ abstract class SummaryResynthesizer extends ElementResynthesizer {
   final Map<String, LibraryElement> _resynthesizedLibraries =
       <String, LibraryElement>{};
 
-  SummaryResynthesizer(
-      AnalysisContext context, this.sourceFactory, this.strongMode)
-      : super(context) {
-    _buildTypeProvider();
-  }
+  SummaryResynthesizer(this.parent, AnalysisContext context, this.typeProvider,
+      this.sourceFactory, this.strongMode)
+      : super(context);
 
   /**
    * Number of libraries that have been resynthesized so far.
@@ -85,14 +90,23 @@ abstract class SummaryResynthesizer extends ElementResynthesizer {
   int get resynthesisCount => _resynthesizedLibraries.length;
 
   /**
-   * The [TypeProvider] used to obtain SDK types during resynthesis.
+   * Perform delayed finalization of the `dart:core` and `dart:async` libraries.
    */
-  TypeProvider get typeProvider => _typeProvider;
+  void finalizeCoreAsyncLibraries() {
+    (_resynthesizedLibraries['dart:core'] as LibraryElementImpl)
+        .createLoadLibraryFunction(typeProvider);
+    (_resynthesizedLibraries['dart:async'] as LibraryElementImpl)
+        .createLoadLibraryFunction(typeProvider);
+  }
 
   @override
   Element getElement(ElementLocation location) {
     List<String> components = location.components;
     String libraryUri = components[0];
+    // Ask the parent resynthesizer.
+    if (parent != null && parent._hasLibrarySummary(libraryUri)) {
+      return parent.getElement(location);
+    }
     // Resynthesize locally.
     if (components.length == 1) {
       return getLibraryElement(libraryUri);
@@ -189,8 +203,11 @@ abstract class SummaryResynthesizer extends ElementResynthesizer {
    * hasn't been resynthesized already.
    */
   LibraryElement getLibraryElement(String uri) {
+    if (parent != null && parent._hasLibrarySummary(uri)) {
+      return parent.getLibraryElement(uri);
+    }
     return _resynthesizedLibraries.putIfAbsent(uri, () {
-      LinkedLibrary serializedLibrary = getLinkedSummary(uri);
+      LinkedLibrary serializedLibrary = _getLinkedSummaryOrNull(uri);
       Source librarySource = _getSource(uri);
       if (serializedLibrary == null) {
         LibraryElementImpl libraryElement =
@@ -206,7 +223,7 @@ abstract class SummaryResynthesizer extends ElementResynthesizer {
         libraryElement.exportNamespace = new Namespace({});
         return libraryElement;
       }
-      UnlinkedUnit unlinkedSummary = getUnlinkedSummary(uri);
+      UnlinkedUnit unlinkedSummary = _getUnlinkedSummaryOrNull(uri);
       if (unlinkedSummary == null) {
         throw new StateError('Unable to find unlinked summary: $uri');
       }
@@ -217,7 +234,7 @@ abstract class SummaryResynthesizer extends ElementResynthesizer {
           serializedUnits.add(null);
         } else {
           String partAbsUri = partSource.uri.toString();
-          serializedUnits.add(getUnlinkedSummary(partAbsUri) ??
+          serializedUnits.add(_getUnlinkedSummaryOrNull(partAbsUri) ??
               new UnlinkedUnitBuilder(codeRange: new CodeRangeBuilder()));
         }
       }
@@ -250,15 +267,15 @@ abstract class SummaryResynthesizer extends ElementResynthesizer {
    */
   bool hasLibrarySummary(String uri);
 
-  void _buildTypeProvider() {
-    var coreLibrary = getLibraryElement('dart:core') as LibraryElementImpl;
-    var asyncLibrary = getLibraryElement('dart:async') as LibraryElementImpl;
-    SummaryTypeProvider summaryTypeProvider = new SummaryTypeProvider();
-    summaryTypeProvider.initializeCore(coreLibrary);
-    summaryTypeProvider.initializeAsync(asyncLibrary);
-    coreLibrary.createLoadLibraryFunction(summaryTypeProvider);
-    asyncLibrary.createLoadLibraryFunction(summaryTypeProvider);
-    _typeProvider = summaryTypeProvider;
+  /**
+   * Return the [LinkedLibrary] for the given [uri] or return `null` if it
+   * could not be found.
+   */
+  LinkedLibrary _getLinkedSummaryOrNull(String uri) {
+    if (parent != null && parent._hasLibrarySummary(uri)) {
+      return parent._getLinkedSummaryOrNull(uri);
+    }
+    return getLinkedSummary(uri);
   }
 
   /**
@@ -267,6 +284,28 @@ abstract class SummaryResynthesizer extends ElementResynthesizer {
   Source _getSource(String uri) {
     return _sources.putIfAbsent(uri, () => sourceFactory.forUri(uri));
   }
+
+  /**
+   * Return the [UnlinkedUnit] for the given [uri] or return `null` if it
+   * could not be found.
+   */
+  UnlinkedUnit _getUnlinkedSummaryOrNull(String uri) {
+    if (parent != null && parent._hasLibrarySummary(uri)) {
+      return parent._getUnlinkedSummaryOrNull(uri);
+    }
+    return getUnlinkedSummary(uri);
+  }
+
+  /**
+   * Return `true` if this resynthesizer can provide summaries of the libraries
+   * with the given [uri].
+   */
+  bool _hasLibrarySummary(String uri) {
+    if (parent != null && parent._hasLibrarySummary(uri)) {
+      return true;
+    }
+    return hasLibrarySummary(uri);
+  }
 }
 
 /**