Eagerly declare eval scopes, even for sloppy scopes

src/parser.cc

Index: src/parser.cc
diff --git a/src/parser.cc b/src/parser.cc
index 2838fbc03500f185cc6e253b3b2202ec68901bec..056d34a42faf80946de4c9f5a1a43ce0930c8d66 100644
--- a/src/parser.cc
+++ b/src/parser.cc
@@ -973,9 +973,7 @@ FunctionLiteral* Parser::DoParseProgram(ParseInfo* info) {
     }
     original_scope_ = scope;
     if (info->is_eval()) {
-      if (!scope->is_script_scope() || is_strict(info->language_mode())) {
-        scope = NewScope(scope, EVAL_SCOPE);
-      }
+      scope = NewScope(scope, EVAL_SCOPE);
     } else if (info->is_module()) {
       scope = NewScope(scope, MODULE_SCOPE);
     }
@@ -1002,10 +1000,7 @@ FunctionLiteral* Parser::DoParseProgram(ParseInfo* info) {
       DCHECK(allow_harmony_modules());
       ParseModuleItemList(body, &ok);
     } else {
-      Scope* eval_scope = nullptr;
-      ParseStatementList(body, Token::EOS, info->is_eval(), &eval_scope, &ok);
-      if (eval_scope != nullptr)
-        eval_scope->set_end_position(scanner()->location().end_pos);
+      ParseStatementList(body, Token::EOS, &ok);
     }
 
     scope->set_end_position(scanner()->location().end_pos);
@@ -1190,7 +1185,7 @@ FunctionLiteral* Parser::ParseLazy(Isolate* isolate, ParseInfo* info,
 
 
 void* Parser::ParseStatementList(ZoneList<Statement*>* body, int end_token,
-                                 bool is_eval, Scope** eval_scope, bool* ok) {
+                                 bool* ok) {
   // StatementList ::
   //   (StatementListItem)* <end_token>
 
@@ -1259,23 +1254,6 @@ void* Parser::ParseStatementList(ZoneList<Statement*>* body, int end_token,
           // Strong mode implies strict mode. If there are several "use strict"
           // / "use strong" directives, do the strict mode changes only once.
           if (is_sloppy(scope_->language_mode())) {
-            // TODO(mstarzinger): Global strict eval calls, need their own scope
-            // as specified in ES5 10.4.2(3). The correct fix would be to always
-            // add this scope in DoParseProgram(), but that requires adaptations
-            // all over the code base, so we go with a quick-fix for now.
-            // In the same manner, we have to patch the parsing mode.
-            if (is_eval && !scope_->is_eval_scope()) {
-              DCHECK(scope_->is_script_scope());
-              Scope* scope = NewScope(scope_, EVAL_SCOPE);
-              scope->set_start_position(scope_->start_position());
-              scope->set_end_position(scope_->end_position());
-              scope_ = scope;
-              if (eval_scope != NULL) {
-                // Caller will correct the positions of the ad hoc eval scope.
-                *eval_scope = scope;
-              }
-              mode_ = PARSE_EAGERLY;
-            }
             scope_->SetLanguageMode(static_cast<LanguageMode>(
                 scope_->language_mode() | STRICT_BIT));
           }
@@ -4211,7 +4189,7 @@ ZoneList<Statement*>* Parser::ParseEagerFunctionBody(
         yield, RelocInfo::kNoPosition), zone());
   }
 
-  ParseStatementList(body, Token::RBRACE, false, NULL, CHECK_OK);
+  ParseStatementList(body, Token::RBRACE, CHECK_OK);
 
   if (IsGeneratorFunction(kind)) {
     VariableProxy* get_proxy = factory()->NewVariableProxy(