SpellCheck: the custom dictionary should be per profile.

chrome/browser/spellchecker/spellcheck_profile_provider.h

 // Copyright (c) 2011 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_BROWSER_SPELLCHECKER_SPELLCHECK_PROFILE_PROVIDER_H_
 #define CHROME_BROWSER_SPELLCHECKER_SPELLCHECK_PROFILE_PROVIDER_H_
 #pragma once
 
 #include <string>
 #include <vector>
 
 // A user profile provider and state notification receiver for the
 // SpellCheckHost.
 class SpellCheckProfileProvider {
  public:
   typedef std::vector<std::string> CustomWordList;
 
   // Invoked on the UI thread when SpellCheckHost is initialized.
   virtual void SpellCheckHostInitialized(
       CustomWordList* custom_words) = 0;
 
   // Returns in-memory cache of custom word list.
   virtual const CustomWordList& GetCustomWords() const = 0;
 
   // Invoked on the Ui thread when new custom word is registered.
   virtual void CustomWordAddedLocally(const std::string& word) = 0;
 
+  // Loads the custom dictionary associated with this profile
+  virtual void LoadCustomDictionary(CustomWordList* custom_words) = 0;
+
+  // Writes a word to the custom dictionary associated with this profile.
+  virtual void WriteWordToCustomDictionary(const std::string& word) = 0;
+
  protected:
   virtual ~SpellCheckProfileProvider() {}
 };
 
 #endif  // CHROME_BROWSER_SPELLCHECKER_SPELLCHECK_PROFILE_PROVIDER_H_