VM: [Kernel] Partial support for metadata annotations

runtime/vm/kernel_to_il.h

Index: runtime/vm/kernel_to_il.h
diff --git a/runtime/vm/kernel_to_il.h b/runtime/vm/kernel_to_il.h
index 1a49e61d41dbdf65efe6518adc04dcbc18a053b8..cb71aa051cf7aad676321a4c7048d4cb3000baf1 100644
--- a/runtime/vm/kernel_to_il.h
+++ b/runtime/vm/kernel_to_il.h
@@ -949,6 +949,24 @@ class FlowGraphBuilder : public ExpressionVisitor, public StatementVisitor {
   friend class TryFinallyBlock;
 };
 
+RawObject* EvaluateMetadata(TreeNode* kernel_node);
+RawObject* BuildParameterDescriptor(TreeNode* kernel_node);
+
+
+}  // namespace kernel
+}  // namespace dart
+
+#else  // !defined(DART_PRECOMPILED_RUNTIME)
+
+#include "vm/object.h"
+#include "vm/kernel.h"
+
+namespace dart {
+namespace kernel {
+
+RawObject* EvaluateMetadata(TreeNode* kernel_node);
+RawObject* BuildParameterDescriptor(TreeNode* kernel_node);
+
 }  // namespace kernel
 }  // namespace dart