Add HasWord(string) method to SpellcheckCustomDictionary

chrome/common/spellcheck_messages.h

 // Copyright (c) 2012 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.
 
 // IPC messages for spellcheck.
 // Multiply-included message file, hence no include guard.
 
 #include "chrome/common/spellcheck_result.h"
 #include "ipc/ipc_message_macros.h"
 #include "ipc/ipc_platform_file.h"
@@ skipping 13 matching lines @@
 // Messages sent from the browser to the renderer.
 
 IPC_MESSAGE_CONTROL1(SpellCheckMsg_EnableSpellCheck,
                      bool)
 
 // Passes some initialization params to the renderer's spellchecker. This can
 // be called directly after startup or in (async) response to a
 // RequestDictionary ViewHost message.
 IPC_MESSAGE_CONTROL4(SpellCheckMsg_Init,
                      IPC::PlatformFileForTransit /* bdict_file */,
-                     std::vector<std::string> /* custom_dict_words */,
+                     std::set<std::string> /* custom_dict_words */,
                      std::string /* language */,
                      bool /* auto spell correct */)
 
 // Words have been added and removed in the custom dictionary; update the local
 // custom word list.
 IPC_MESSAGE_CONTROL2(SpellCheckMsg_CustomDictionaryChanged,
                      std::vector<std::string> /* words_added */,
                      std::vector<std::string> /* words_removed */)
 
 // Toggle the auto spell correct functionality.
@@ skipping 79 matching lines @@
 
 IPC_MESSAGE_CONTROL3(SpellCheckHostMsg_RequestTextCheck,
                      int /* route_id for response */,
                      int /* request identifier given by WebKit */,
                      string16 /* sentence */)
 
 IPC_MESSAGE_ROUTED2(SpellCheckHostMsg_ToggleSpellCheck,
                     bool /* enabled */,
                     bool /* checked */)
 #endif  // OS_MACOSX