[parsing] Make maybe-assigned more precise for sloppy block functions.

src/parsing/parser.cc

Index: src/parsing/parser.cc
diff --git a/src/parsing/parser.cc b/src/parsing/parser.cc
index efb76fd5d8ac0eccf8b14e223ab4e3b0bae84ae1..750648a3d1444754a3b2761fd9e52aae28566060 100644
--- a/src/parsing/parser.cc
+++ b/src/parsing/parser.cc
@@ -1488,8 +1488,7 @@ Statement* Parser::DeclareFunction(const AstRawString* variable_name,
   VariableProxy* proxy =
       factory()->NewVariableProxy(variable_name, NORMAL_VARIABLE);
 
-  DeclarationScope* target_scope = GetDeclarationScope();
-  MarkTopLevelVariableAsAssigned(target_scope, proxy);
+  MarkTopLevelVariableAsAssigned(scope(), proxy);
 
   Declaration* declaration =
       factory()->NewFunctionDeclaration(proxy, function, scope(), pos);
@@ -1499,7 +1498,8 @@ Statement* Parser::DeclareFunction(const AstRawString* variable_name,
   if (is_sloppy_block_function) {
     SloppyBlockFunctionStatement* statement =
         factory()->NewSloppyBlockFunctionStatement();
-    target_scope->DeclareSloppyBlockFunction(variable_name, scope(), statement);
+    GetDeclarationScope()->DeclareSloppyBlockFunction(variable_name, scope(),
+                                                      statement);
     return statement;
   }
   return factory()->NewEmptyStatement(kNoSourcePosition);