Add an analyzer method to flush resolved ASTs (for testing).

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 d20eff544b837409d2050db9c072f6cc80ee80af..912d4ae4cdf5fca34819e1aa7068d411da710130 100644
--- a/pkg/analyzer/lib/src/context/context.dart
+++ b/pkg/analyzer/lib/src/context/context.dart
@@ -1186,6 +1186,17 @@ class AnalysisContextImpl implements InternalAnalysisContext {
   }
 
   @override
+  void test_flushResolvedUnit(Source source) {

[Brian Wilkerson, 2015/06/24 16:56:58]

The non-task-model version of this method flushes all AST structures, but this
misses PARSED_UNIT. Not sure which is the intended behavior.

[Paul Berry, 2015/06/24 20:08:31]

Ok, as per our discussion, I've renamed this to test_flushAstStructures and made
it flush PARSED_UNIT as well.

+    CacheEntry entry = getCacheEntry(source);
+    entry.setState(RESOLVED_UNIT1, CacheState.FLUSHED);
+    entry.setState(RESOLVED_UNIT2, CacheState.FLUSHED);
+    entry.setState(RESOLVED_UNIT4, CacheState.FLUSHED);
+    entry.setState(RESOLVED_UNIT5, CacheState.FLUSHED);
+    entry.setState(RESOLVED_UNIT6, CacheState.FLUSHED);
+    entry.setState(RESOLVED_UNIT, CacheState.FLUSHED);
+  }
+
+  @override
   bool validateCacheConsistency() {
     int consistencyCheckStart = JavaSystem.nanoTime();
     HashSet<Source> changedSources = new HashSet<Source>();