Move sloppy block function hoisting logic from Parser to Scope.

src/ast/scopes.h

Index: src/ast/scopes.h
diff --git a/src/ast/scopes.h b/src/ast/scopes.h
index 5f0ebb9ed50dab8a625d9368290a05cf199aca58..7a7d6fd7b33581a99566fffe7c4edf755d1f43eb 100644
--- a/src/ast/scopes.h
+++ b/src/ast/scopes.h
@@ -743,6 +743,10 @@ class DeclarationScope : public Scope {
     sloppy_block_function_map_.Declare(zone(), name, statement);
   }
 
+  // Go through sloppy_block_function_map_ and hoist those (into this scope)
+  // which should be hoisted.
+  void HoistSloppyBlockFunctions(AstNodeFactory* factory, bool* ok);
+
   SloppyBlockFunctionMap* sloppy_block_function_map() {
     return &sloppy_block_function_map_;
   }