Implement type inference for asserts in constructor initializers.

pkg/analyzer/test/src/dart/analysis/base.dart

Index: pkg/analyzer/test/src/dart/analysis/base.dart
diff --git a/pkg/analyzer/test/src/dart/analysis/base.dart b/pkg/analyzer/test/src/dart/analysis/base.dart
index 9e1b76a4a38bd7a7eb5e57d8f1a715b893adc850..23ae5c420f443910eeff631d1605213955dba7cb 100644
--- a/pkg/analyzer/test/src/dart/analysis/base.dart
+++ b/pkg/analyzer/test/src/dart/analysis/base.dart
@@ -92,13 +92,15 @@ class BaseAnalysisDriverTest {
           }),
           new ResourceUriResolver(provider)
         ], null, provider),
-        new AnalysisOptionsImpl()
-          ..strongMode = true
-          ..enableUriInPartOf = true,
+        createAnalysisOptions(),
         disableChangesAndCacheAllResults: disableChangesAndCacheAllResults,
         externalSummaries: externalSummaries);
   }
 
+  AnalysisOptionsImpl createAnalysisOptions() => new AnalysisOptionsImpl()
+    ..strongMode = true
+    ..enableUriInPartOf = true;
+
   int findOffset(String search) {
     int offset = testCode.indexOf(search);
     if (offset < 0) {