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 9a7a71ac30a6cf5062ef6ed8e360e82a0b8d6d0d..6343b56911433d85e1d7839ebf445b164e83a3a6 100644
--- a/runtime/vm/kernel_to_il.h
+++ b/runtime/vm/kernel_to_il.h
@@ -945,6 +945,24 @@ 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