Remove buildTopLevelFunctions() and resynthesize top-level functions directly.

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 a10840fbfe7b32c7d8379f409fd3d052260b4d52..e5d0be7c5c6dbbfbcd372567ead3838ca3d7d94b 100644
--- a/pkg/analyzer/lib/src/summary/resynthesize.dart
+++ b/pkg/analyzer/lib/src/summary/resynthesize.dart
@@ -1525,11 +1525,6 @@ class _ResynthesizerContext implements ResynthesizerContext {
   }
 
   @override
-  List<FunctionElementImpl> buildTopLevelFunctions() {
-    return _unitResynthesizer.buildTopLevelFunctions();
-  }
-
-  @override
   UnitExplicitTopLevelVariables buildTopLevelVariables() {
     return _unitResynthesizer.buildUnitExplicitTopLevelVariables();
   }
@@ -2120,19 +2115,6 @@ class _UnitResynthesizer {
     return buildType(type, typeParameterContext);
   }
 
-  List<FunctionElementImpl> buildTopLevelFunctions() {
-    List<FunctionElementImpl> functions = <FunctionElementImpl>[];
-    List<UnlinkedExecutable> executables = unlinkedUnit.executables;
-    for (UnlinkedExecutable unlinkedExecutable in executables) {
-      if (unlinkedExecutable.kind == UnlinkedExecutableKind.functionOrMethod) {
-        FunctionElementImpl function =
-            new FunctionElementImpl.forSerialized(unlinkedExecutable, unit);
-        functions.add(function);
-      }
-    }
-    return functions;
-  }
-
   /**
    * Build a [DartType] object based on a [EntityRef].  This [DartType]
    * may refer to elements in other libraries than the library being