Refactor Parsing to remove compiler dependency

tests/compiler/dart2js/type_checker_test.dart

Index: tests/compiler/dart2js/type_checker_test.dart
diff --git a/tests/compiler/dart2js/type_checker_test.dart b/tests/compiler/dart2js/type_checker_test.dart
index 446062feffe6474a62c2bba4ba1d3a9c6fb33984..0b3fb873e989ce1e2249ddb3cd83e4c8968a8a80 100644
--- a/tests/compiler/dart2js/type_checker_test.dart
+++ b/tests/compiler/dart2js/type_checker_test.dart
@@ -2513,13 +2513,13 @@ analyzeTopLevel(String text, [expectedWarnings]) {
         classElement.forEachLocalMember((Element e) {
           if (!e.isSynthesized) {
             element = e;
-            node = element.parseNode(compiler.parsing);
+            node = element.parseNode(compiler.parsingContext);
             compiler.resolver.resolve(element);
             mapping = element.treeElements;
           }
         });
       } else {
-        node = element.parseNode(compiler.parsing);
+        node = element.parseNode(compiler.parsingContext);
         compiler.resolver.resolve(element);
         mapping = element.treeElements;
       }