Various IWYU fixes.

src/parsing/parse-info.h

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_PARSING_PARSE_INFO_H_
 #define V8_PARSING_PARSE_INFO_H_
 
 #include "include/v8.h"
 #include "src/globals.h"
 #include "src/handles.h"
+#include "src/objects/scope-info.h"
 
 namespace v8 {
 
 class Extension;
 
 namespace internal {
 
 class AstRawString;
 class AstValueFactory;
 class DeclarationScope;
@@ skipping 238 matching lines @@
 
   void SetFlag(Flag f) { flags_ |= f; }
   void SetFlag(Flag f, bool v) { flags_ = v ? flags_ | f : flags_ & ~f; }
   bool GetFlag(Flag f) const { return (flags_ & f) != 0; }
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PARSING_PARSE_INFO_H_