Revert of Allow storing multiple replacements on SpellCheckResult

components/spellcheck/common/spellcheck_result.h

 // Copyright (c) 2012 The Chromium 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 COMPONENTS_SPELLCHECK_COMMON_SPELLCHECK_RESULT_H_
 #define COMPONENTS_SPELLCHECK_COMMON_SPELLCHECK_RESULT_H_
 
 #include <stdint.h>
-#include <vector>
 
 #include "base/strings/string16.h"
 
 // This class mirrors blink::WebTextCheckingResult which holds a
 // misspelled range inside the checked text. It also contains a
 // possible replacement of the misspelling if it is available.
 struct SpellCheckResult {
   enum Decoration {
     // Red underline for misspelled words.
     SPELLING = 1 << 1,
 
     // Gray underline for correctly spelled words that are incorrectly used in
     // their context.
     GRAMMAR = 1 << 2,
   };
 
-  // Default values are so we have a default constructor for IPC::ReadParam()
-  explicit SpellCheckResult(
-      Decoration d = SPELLING,
-      int loc = 0,
-      int len = 0,
-      const std::vector<base::string16>& rep = std::vector<base::string16>());
-
-  explicit SpellCheckResult(Decoration d,
-                            int loc,
-                            int len,
-                            const base::string16& rep);
-
-  ~SpellCheckResult();
-  SpellCheckResult(const SpellCheckResult&);
+  explicit SpellCheckResult(Decoration d = SPELLING,
+                            int loc = 0,
+                            int len = 0,
+                            const base::string16& rep = base::string16())
+      : decoration(d), location(loc), length(len), replacement(rep) {}
 
   Decoration decoration;
   int location;
   int length;
-  std::vector<base::string16> replacements;
+  base::string16 replacement;
 };
 
 #endif  // COMPONENTS_SPELLCHECK_COMMON_SPELLCHECK_RESULT_H_