Re-implement the status page for the new task model

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 fc44cf809e10d22a099cdf2a50cd9add80840351..d2b449c4ebaa8b00d4ccaa10c804a9b855d46d72 100644
--- a/pkg/analyzer/lib/src/context/context.dart
+++ b/pkg/analyzer/lib/src/context/context.dart
@@ -1247,6 +1247,7 @@ class AnalysisContextImpl implements InternalAnalysisContext {
     return changedSources.length > 0;
   }
 
+  @deprecated
   @override
   void visitCacheItems(void callback(Source source, SourceEntry dartEntry,
       DataDescriptor rowDesc, CacheState state)) {
@@ -1312,9 +1313,7 @@ class AnalysisContextImpl implements InternalAnalysisContext {
 //    }
   }
 
-  /**
-   * Visit all entries of the content cache.
-   */
+  @override
   void visitContentCache(ContentCacheVisitor visitor) {
     _contentCache.accept(visitor);
   }