Make Analyzer, VM and dart2js accept URI strings as part-of library identifier.

pkg/analyzer/test/src/task/dart_test.dart

Index: pkg/analyzer/test/src/task/dart_test.dart
diff --git a/pkg/analyzer/test/src/task/dart_test.dart b/pkg/analyzer/test/src/task/dart_test.dart
index 75d799de04c0805851a87661ca82989ce2a352db..917c7d0661b42aa0a20655917f33d96deefad271 100644
--- a/pkg/analyzer/test/src/task/dart_test.dart
+++ b/pkg/analyzer/test/src/task/dart_test.dart
@@ -870,10 +870,14 @@ part of my_lib;
 part of my_lib;
 '''
     });
-    _assertErrorsWithCodes(
-        [ResolverErrorCode.MISSING_LIBRARY_DIRECTIVE_WITH_PART]);
-    AnalysisError error = errorListener.errors[0];
-    expect(error.getProperty(ErrorProperty.PARTS_LIBRARY_NAME), 'my_lib');
+    if (context.analysisOptions.enableUriInPartOf) {
+      // Should report that names are wrong.

[Lasse Reichstein Nielsen, 2017/01/26 10:39:13]

TODO added here.

+    } else {
+      _assertErrorsWithCodes(
+          [ResolverErrorCode.MISSING_LIBRARY_DIRECTIVE_WITH_PART]);
+      AnalysisError error = errorListener.errors[0];
+      expect(error.getProperty(ErrorProperty.PARTS_LIBRARY_NAME), 'my_lib');
+    }
   }
 
   test_perform_error_missingLibraryDirectiveWithPart_noCommon() {
@@ -889,10 +893,14 @@ part of libA;
 part of libB;
 '''
     });
-    _assertErrorsWithCodes(
-        [ResolverErrorCode.MISSING_LIBRARY_DIRECTIVE_WITH_PART]);
-    AnalysisError error = errorListener.errors[0];
-    expect(error.getProperty(ErrorProperty.PARTS_LIBRARY_NAME), isNull);
+    if (context.analysisOptions.enableUriInPartOf) {
+      // Should report that names are wrong.

[Lasse Reichstein Nielsen, 2017/01/26 10:39:13]

TODO added here.

+    } else {
+      _assertErrorsWithCodes(
+          [ResolverErrorCode.MISSING_LIBRARY_DIRECTIVE_WITH_PART]);
+      AnalysisError error = errorListener.errors[0];
+      expect(error.getProperty(ErrorProperty.PARTS_LIBRARY_NAME), isNull);
+    }
   }
 
   test_perform_error_partDoesNotExist() {