Revert "Issue 27375. Use ContextBuilder to find analysis options file in analyzer_cli."

pkg/analyzer_cli/lib/src/driver.dart

Index: pkg/analyzer_cli/lib/src/driver.dart
diff --git a/pkg/analyzer_cli/lib/src/driver.dart b/pkg/analyzer_cli/lib/src/driver.dart
index 9e32cf0d951015241c42ad50e8f87bdbd0db9a51..ec779a7eb8dda662d1fdfe4fb65c148d403fe406 100644
--- a/pkg/analyzer_cli/lib/src/driver.dart
+++ b/pkg/analyzer_cli/lib/src/driver.dart
@@ -744,8 +744,12 @@ class Driver implements CommandLineStarter {
             exitCode: ErrorSeverity.ERROR.ordinal);
       }
     } else {
-      return new ContextBuilder(resourceProvider, null, null)
-          .getOptionsFile(options.sourceFiles.first);
+      filePath = AnalysisEngine.ANALYSIS_OPTIONS_FILE;
+      file = resourceProvider.getFile(filePath);
+      if (!file.exists) {
+        filePath = AnalysisEngine.ANALYSIS_OPTIONS_YAML_FILE;
+        file = resourceProvider.getFile(filePath);
+      }
     }
     return file;
   }