Precompilation: when removing top-level fields and functions, also remove them from the library dic…

runtime/vm/precompiler.h

Index: runtime/vm/precompiler.h
diff --git a/runtime/vm/precompiler.h b/runtime/vm/precompiler.h
index 0d98df2382d7d7ab2da093a7428554d3c4c770cc..5b50e49b0434dc868427f0129764f4572fb60b57 100644
--- a/runtime/vm/precompiler.h
+++ b/runtime/vm/precompiler.h
@@ -179,14 +179,15 @@ class Precompiler : public ValueObject {
   void ProcessFunction(const Function& function);
   void CheckForNewDynamicFunctions();
 
-  void DropUncompiledFunctions();
+  void DropFunctions();
   void DropFields();
-  void CollectDynamicFunctionNames();
   void BindStaticCalls();
   void DedupStackmaps();
   void DedupStackmapLists();
   void ResetPrecompilerState();
 
+  void CollectDynamicFunctionNames();
+
   class FunctionVisitor : public ValueObject {
    public:
     virtual ~FunctionVisitor() {}