Remove CompilationUnit name requirement

pkg/analyzer/lib/src/context/context.dart

Index: pkg/analyzer/lib/src/context/context.dart
diff --git a/pkg/analyzer/lib/src/context/context.dart b/pkg/analyzer/lib/src/context/context.dart
index 2a0b7d5d609ef9f32c422948e5ccc32bd3d42ce1..b39f42982ad6f65a333ca6626d79156c7b3f8263 100644
--- a/pkg/analyzer/lib/src/context/context.dart
+++ b/pkg/analyzer/lib/src/context/context.dart
@@ -1199,10 +1199,6 @@ class AnalysisContextImpl implements InternalAnalysisContext {
   @override
   CompilationUnit resolveCompilationUnit2(
       Source unitSource, Source librarySource) {
-    if (!AnalysisEngine.isDartFileName(unitSource.shortName) ||
-        !AnalysisEngine.isDartFileName(librarySource.shortName)) {
-      return null;
-    }
     return computeResult(
         new LibrarySpecificUnit(librarySource, unitSource), RESOLVED_UNIT);
   }