Move Parser::Declare to Scope.

src/parsing/parser.h

Index: src/parsing/parser.h
diff --git a/src/parsing/parser.h b/src/parsing/parser.h
index 92ab770a9fbecc05fc0005cadf22f538abfe1d3f..a0d7a95ed668a2cd77577c9fdb64b1ed8baf0480 100644
--- a/src/parsing/parser.h
+++ b/src/parsing/parser.h
@@ -301,17 +301,6 @@ class Parser : public ParserBase<Parser> {
   DoExpression* ParseDoExpression(bool* ok);
   Expression* ParseYieldStarExpression(bool* ok);
 
-  struct DeclarationDescriptor {
-    enum Kind { NORMAL, PARAMETER };
-    Parser* parser;
-    Scope* scope;
-    Scope* hoist_scope;
-    VariableMode mode;
-    int declaration_pos;
-    int initialization_pos;
-    Kind declaration_kind;
-  };
-
   struct DeclarationParsingResult {
     struct Declaration {
       Declaration(Expression* pattern, int initializer_position,