Re-implement the status page for the new task model

pkg/analyzer/test/generated/engine_test.dart

Index: pkg/analyzer/test/generated/engine_test.dart
diff --git a/pkg/analyzer/test/generated/engine_test.dart b/pkg/analyzer/test/generated/engine_test.dart
index 1bc307ebcf05104228e10378f8e847ed5f5e925b..f5a4c016165bef81143eba87f2dc8845268bd30c 100644
--- a/pkg/analyzer/test/generated/engine_test.dart
+++ b/pkg/analyzer/test/generated/engine_test.dart
@@ -5820,11 +5820,17 @@ class TestAnalysisContext implements InternalAnalysisContext {
     return false;
   }
 
+  @deprecated
   @override
   void visitCacheItems(void callback(Source source, SourceEntry dartEntry,
       DataDescriptor rowDesc, CacheState state)) {
     fail("Unexpected invocation of visitCacheItems");
   }
+
+  @override
+  void visitContentCache(ContentCacheVisitor visitor) {
+    fail("Unexpected invocation of visitContentCache");
+  }
 }
 
 class TestAnalysisContext_test_applyChanges extends TestAnalysisContext {