VM [KERNEL] Fix performance issue in KernelReader

runtime/vm/kernel_reader.h

Index: runtime/vm/kernel_reader.h
diff --git a/runtime/vm/kernel_reader.h b/runtime/vm/kernel_reader.h
index 5912c3694d2e9dd3b4e37a2837ee8ebb103644d9..520c61e1b7e401753548714f563d6e9ee0b9aa3a 100644
--- a/runtime/vm/kernel_reader.h
+++ b/runtime/vm/kernel_reader.h
@@ -76,7 +76,10 @@ class KernelReader {
   void ReadProcedure(const dart::Library& library,
                      const dart::Class& owner,
                      Procedure* procedure,
-                     Class* kernel_klass = NULL);
+                     Class* kernel_klass,
+                     GrowableArray<const dart::Function*>* functions);
+
+  RawArray* MakeFunctionsArray(GrowableArray<const dart::Function*>* functions);
 
   // If klass's script is not the script at the uri index, return a PatchClass
   // for klass whose script corresponds to the uri index.
@@ -87,7 +90,8 @@ class KernelReader {
 
   void GenerateFieldAccessors(const dart::Class& klass,
                               const dart::Field& field,
-                              Field* kernel_field);
+                              Field* kernel_field,
+                              GrowableArray<const dart::Function*>* functions);
 
   void SetupFieldAccessorFunction(const dart::Class& klass,
                                   const dart::Function& function);