Collect spelling service feedback on Mac

chrome/common/spellcheck_marker.h

 // Copyright (c) 2013 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 CHROME_COMMON_SPELLCHECK_MARKER_H_
 #define CHROME_COMMON_SPELLCHECK_MARKER_H_
 
-struct SpellCheckMarker {
+class SpellCheckMarker {
+ public:
+  // A predicate to test spellcheck marker validity.
+  class IsValidPredicate {
+   public:
+    typedef SpellCheckMarker argument_type;
+    explicit IsValidPredicate(size_t text_length) : text_length_(text_length) {}
+    bool operator()(const SpellCheckMarker& marker) const {
+      return marker.offset < text_length_;
+    }
+   private:
+    size_t text_length_;
+  };
+
   // IPC requires a default constructor.
   SpellCheckMarker() : hash(-1), offset(-1) {}
 
   SpellCheckMarker(uint32 hash, size_t offset) : hash(hash), offset(offset) {}
 
   uint32 hash;
   size_t offset;
 };
 
 #endif  // CHROME_COMMON_SPELLCHECK_MARKER_H_