SpellCheck: the custom dictionary should be per profile.

chrome/browser/spellchecker/spellcheck_profile_provider.h

Index: chrome/browser/spellchecker/spellcheck_profile_provider.h
diff --git a/chrome/browser/spellchecker/spellcheck_profile_provider.h b/chrome/browser/spellchecker/spellcheck_profile_provider.h
index 93769824aa7a4ccdc17f34c50555b5420c217a70..f0685d7206a234cbbf52e9c0de1334197db898f0 100644
--- a/chrome/browser/spellchecker/spellcheck_profile_provider.h
+++ b/chrome/browser/spellchecker/spellcheck_profile_provider.h
@@ -25,6 +25,12 @@ class SpellCheckProfileProvider {
   // 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() {}
 };