Revert "Remove spellcheck feedback."

chrome/browser/renderer_context_menu/spelling_menu_observer.h

Index: chrome/browser/renderer_context_menu/spelling_menu_observer.h
diff --git a/chrome/browser/renderer_context_menu/spelling_menu_observer.h b/chrome/browser/renderer_context_menu/spelling_menu_observer.h
index e79b1e09bf488ea073257870aab8101948c765a1..a29965de2f727d95129101daa737c520e87fadaf 100644
--- a/chrome/browser/renderer_context_menu/spelling_menu_observer.h
+++ b/chrome/browser/renderer_context_menu/spelling_menu_observer.h
@@ -48,6 +48,7 @@ class SpellingMenuObserver : public RenderViewContextMenuObserver {
   bool IsCommandIdChecked(int command_id) override;
   bool IsCommandIdEnabled(int command_id) override;
   void ExecuteCommand(int command_id) override;
+  void OnMenuCancel() override;
 
   // A callback function called when the Spelling service finishes checking a
   // misspelled word.
@@ -87,6 +88,10 @@ class SpellingMenuObserver : public RenderViewContextMenuObserver {
   // this word to the custom-word dictionary.
   base::string16 misspelled_word_;
 
+  // The hash identifier for the misspelled word. Used for collecting user
+  // feedback to spellcheck suggestions.
+  uint32 misspelling_hash_;
+
   // The string representing the result of this call. This string is a
   // suggestion when this call finished successfully. Otherwise it is error
   // text. Until we receive a response from the Spelling service, this string