Adds a bubble that asks a user whether to integrate the Spelling service.

chrome/browser/tab_contents/spelling_menu_observer.h

Index: chrome/browser/tab_contents/spelling_menu_observer.h
===================================================================
--- chrome/browser/tab_contents/spelling_menu_observer.h	(revision 108037)
+++ chrome/browser/tab_contents/spelling_menu_observer.h	(working copy)
@@ -7,6 +7,7 @@
 #pragma once
 
 #include <string>
+#include <vector>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/string16.h"
@@ -74,6 +75,11 @@
   // this interface to avoid accesing context-menu items directly.
   RenderViewContextMenuProxy* proxy_;
 
+  // Suggested words from the local spellchecker. If the spelling service
+  // returns a word in this list, we hide the context-menu item to prevent
+  // showing the same word twice.
+  std::vector<string16> suggestions_;
+
   // The string used for animation until we receive a response from the Spelling
   // service. The current animation just adds periods at the end of this string:
   //   'Loading' -> 'Loading.' -> 'Loading..' -> 'Loading...' (-> 'Loading')